Skip to content
Nutrition & Diet
✓Fact-Checked

Our content is fact checked by our senior editorial staff to reflect accuracy and ensure our readers get sound information and advice to make the smartest, healthiest choices.

We adhere to structured guidelines for sourcing information and linking to other resources, including scientific studies and medical journals.

If you have any concerns about the accuracy of our content, please reach out to our editors by e-mailing editors@celebwell.com.

10 Side Effects of Rapid Weight Loss

Losing weight fast may seem ideal, but there are a few side effect to look out for.

Leah Groth
By Leah GrothMay 13, 2024
Leah Groth
Writer, Editor, and Content Creator
Leah Groth has decades of experience covering all things health, wellness and fitness related.
See Full Bio
Follow:
FACT CHECKED BY Christopher Roback
Woman looking in the mirror and checking her hair.
Shutterstock
Leah Groth
By Leah GrothMay 13, 2024
Leah Groth
Writer, Editor, and Content Creator
Leah Groth has decades of experience covering all things health, wellness and fitness related.
See Full Bio
Follow:
FACT CHECKED BY Christopher Roback
Nutrition & Diet

Losing weight fast can seem like a dream come true. However, there are some negatives that come along with rapid weight loss you should consider before taking a GLP-1 drug like Ozempic or going on a drastic diet. We asked some of the top doctors, plastic surgeons, and weight loss experts to reveal major side effects of rapid weight loss – via either the natural way or using weight loss drugs – to look out for.

Fat Deposits

Pen,Injection,Semaglutide,Ozempic, diabetes, medicine, medication, diet, weight, lossShutterstock

While losing weight reduces overall body fat, deposits still exist. “Treatments like Ozempic help with rapid weight loss, but fat still exists in a reduced size,” Vishal Verma, MD, Founder of Revive Med Spa, says, recommending treatments like CoolSculpting to help “eliminate the fat cells, furthering the long-term results.”

RELATED:20 Possible Ozempic Side Effects

Uneven Skin Tone or Texture

Portrait of a man worried about hair lossShutterstock

There is also the appearance of uneven skin tone/texture with weight loss. “Stretch marks may become more apparent with weight loss, so resurfacing treatments can help even tone and texture for a more youthful, radiant glow,” says Dr. Verma. “

Hair Loss

Woman's hand holding hair strands fallen on a comb in close-upShutterstock

Hair loss can be a potential side effect of rapid weight loss. This is often due to nutrient deficiencies, stress, and hormonal changes that occur when the body loses weight quickly.

RELATED: 20 Incredible Ozempic Success Stories of All Time

Unplanned Pregnancies are Being Examined

Flat,Belly,Expecting,Baby,pregnant,diet,healthShutterstock

Losing weight can impact fertility. "Weight loss can generally be associated with increased fertility by restoring normal ovulation in people who have PCOS or other causes of abnormal cycles," said Dr. Daniel Drucker, a professor and researcher at the University of Toronto's Mount Sinai Hospital and a pioneer of research into GLP-1 in an interview with CNN.

Ileus

woman clutching her stomach with her hands in discomfortShutterstock

Ileus, “which is a temporary condition where your intestine can't push food and waste out of your body, is an unofficial side effect due to the effects of slowing down the gut movement,” says Kylie Bensley, MS, RD and founder of Sulinu Nutrition. If you think you have this, she recommends seeking medical advice.

Muscle Loss

Bearded thin man measuring biceps, muscles of his left arm with a yellow tape measure. He's calm, serious, quiet. Wearing blue t-shirt. White background.Shutterstock

Sue Decotiis, MD, NYC weight-loss doctor, notes that there are a few reasons why rapidly losing weight leads to muscle loss. “There are many people who lose muscle because they aren’t drinking enough water. Water intake is imperative. You really need to drink a lot of water when you’re burning that much fat. If you are not drinking enough water, your body won’t burn fat, and you’ll lose muscle,” she says. The other reason is losing weight rapidly, which often leads to losing muscle. To mitigate this, make sure to lift weights or do another form of muscle-strengthening exercise.

RELATED:What Happens to Your Body When You Stop Taking Ozempic

More Self-Esteem

Happy couple enjoy outdoor leisure activity together carrying and using a bike and laughing a lot. Love and friendship with mature man and woman in youthful lifestyle. Concept of joyful and excitementShutterstock

A positive side effect? “I’ve seen a lot of positive effects on personality in my practice. When people lose weight, they have better self-esteem, and they feel more confident in their own skin,” says Dr. Decotiis. “I have people who were using sedatives for anxiety or depression, and then when they lost weight, they felt better and didn’t need them as much. My patient who has ADHD felt they had better focus and concentration.”

Eating Disorder Triggering

,Woman,,Guilty,Eating,Cake,Cheating,Diet,eating, disorderShutterstock

If you have eating disorders in your history, rapidly losing weight can be triggering. “If there’s a history of an eating disorder, that’s when people can run into some problems. People who used food as a crutch and would go to food for comfort may miss food a lot because they used to get that dopamine hit from using food to make them feel better,” explains Dr. Decotiis. She recommends anyone who has struggled with these sorts of issues to work with a therapist while losing weight.

Decreased Libido

Beautiful young couple in bedroom. Close up of male and female feet under the blanket looking away from each other.Shutterstock

Losing weight might impact your sex drive. “In the beginning, realize there’s a tremendous metabolic change going on in the body that can cause fatigue, and when someone is tired, their libido goes down. As time goes on and you lose more weight and feel better, libido will go back to normal because you’ll feel more confident and better without clothes on,” says Dr. Decotiis.

RELATED: 20 Things You Need to Know About Ozempic and Weight Loss

Saggy Skin

Close-up Of A Woman Holding Arm With Excess Fat On Grey BackgroundShutterstock

According to Dr. Decotiis, some people are complaining about having a saggy butt, face, or loose skin after rapidly losing weight, which has to do with fat loss. “Your skin stretches when you gain weight, so when you lose a lot of weight, sometimes your skin doesn’t fully go back to normal,” she says. “Think of a woman who’s pregnant. When she has a baby, sometimes her stomach takes time to go back to how it was before.” One way to mitigate this effect is by weight training during the weight loss process. “Additionally, as you age, you have less elasticity in your skin, and you cannot produce as much collagen. Your skin bounces back better when you’re younger,” she says.

💪🔥Body Booster: After losing weight fast, make sure to lift weights or do another form of muscle-strengthening exercise to avoid losing muscle.

sustainable weight lossweight lossozempic

More For You

Nutrition & Diet

10 Side Effects of Rapid Weight Loss

Woman looking in the mirror and checking her hair.
Shutterstock
Leah Groth
By Leah GrothMay 13, 2024
Leah Groth
Writer, Editor, and Content Creator
Leah Groth has decades of experience covering all things health, wellness and fitness related.
See Full Bio
Follow:
FACT CHECKED BY Christopher Roback
✓Fact-Checked

Our content is fact checked by our senior editorial staff to reflect accuracy and ensure our readers get sound information and advice to make the smartest, healthiest choices.

We adhere to structured guidelines for sourcing information and linking to other resources, including scientific studies and medical journals.

If you have any concerns about the accuracy of our content, please reach out to our editors by e-mailing editors@bodynetwork.com.

Losing weight fast can seem like a dream come true. However, there are some negatives that come along with rapid weight loss you should consider before taking a GLP-1 drug like Ozempic or going on a drastic diet. We asked some of the top doctors, plastic surgeons, and weight loss experts to reveal major side effects of rapid weight loss – via either the natural way or using weight loss drugs – to look out for.

Fat Deposits

Pen,Injection,Semaglutide,Ozempic, diabetes, medicine, medication, diet, weight, lossShutterstock

While losing weight reduces overall body fat, deposits still exist. “Treatments like Ozempic help with rapid weight loss, but fat still exists in a reduced size,” Vishal Verma, MD, Founder of Revive Med Spa, says, recommending treatments like CoolSculpting to help “eliminate the fat cells, furthering the long-term results.”

RELATED:20 Possible Ozempic Side Effects

Uneven Skin Tone or Texture

Portrait of a man worried about hair lossShutterstock

There is also the appearance of uneven skin tone/texture with weight loss. “Stretch marks may become more apparent with weight loss, so resurfacing treatments can help even tone and texture for a more youthful, radiant glow,” says Dr. Verma. “

Hair Loss

Woman's hand holding hair strands fallen on a comb in close-upShutterstock

Hair loss can be a potential side effect of rapid weight loss. This is often due to nutrient deficiencies, stress, and hormonal changes that occur when the body loses weight quickly.

RELATED: 20 Incredible Ozempic Success Stories of All Time

Unplanned Pregnancies are Being Examined

Flat,Belly,Expecting,Baby,pregnant,diet,healthShutterstock

Losing weight can impact fertility. "Weight loss can generally be associated with increased fertility by restoring normal ovulation in people who have PCOS or other causes of abnormal cycles," said Dr. Daniel Drucker, a professor and researcher at the University of Toronto's Mount Sinai Hospital and a pioneer of research into GLP-1 in an interview with CNN.

Ileus

woman clutching her stomach with her hands in discomfortShutterstock

Ileus, “which is a temporary condition where your intestine can't push food and waste out of your body, is an unofficial side effect due to the effects of slowing down the gut movement,” says Kylie Bensley, MS, RD and founder of Sulinu Nutrition. If you think you have this, she recommends seeking medical advice.

Muscle Loss

Bearded thin man measuring biceps, muscles of his left arm with a yellow tape measure. He's calm, serious, quiet. Wearing blue t-shirt. White background.Shutterstock

Sue Decotiis, MD, NYC weight-loss doctor, notes that there are a few reasons why rapidly losing weight leads to muscle loss. “There are many people who lose muscle because they aren’t drinking enough water. Water intake is imperative. You really need to drink a lot of water when you’re burning that much fat. If you are not drinking enough water, your body won’t burn fat, and you’ll lose muscle,” she says. The other reason is losing weight rapidly, which often leads to losing muscle. To mitigate this, make sure to lift weights or do another form of muscle-strengthening exercise.

RELATED:What Happens to Your Body When You Stop Taking Ozempic

More Self-Esteem

Happy couple enjoy outdoor leisure activity together carrying and using a bike and laughing a lot. Love and friendship with mature man and woman in youthful lifestyle. Concept of joyful and excitementShutterstock

A positive side effect? “I’ve seen a lot of positive effects on personality in my practice. When people lose weight, they have better self-esteem, and they feel more confident in their own skin,” says Dr. Decotiis. “I have people who were using sedatives for anxiety or depression, and then when they lost weight, they felt better and didn’t need them as much. My patient who has ADHD felt they had better focus and concentration.”

Eating Disorder Triggering

,Woman,,Guilty,Eating,Cake,Cheating,Diet,eating, disorderShutterstock

If you have eating disorders in your history, rapidly losing weight can be triggering. “If there’s a history of an eating disorder, that’s when people can run into some problems. People who used food as a crutch and would go to food for comfort may miss food a lot because they used to get that dopamine hit from using food to make them feel better,” explains Dr. Decotiis. She recommends anyone who has struggled with these sorts of issues to work with a therapist while losing weight.

Decreased Libido

Beautiful young couple in bedroom. Close up of male and female feet under the blanket looking away from each other.Shutterstock

Losing weight might impact your sex drive. “In the beginning, realize there’s a tremendous metabolic change going on in the body that can cause fatigue, and when someone is tired, their libido goes down. As time goes on and you lose more weight and feel better, libido will go back to normal because you’ll feel more confident and better without clothes on,” says Dr. Decotiis.

RELATED: 20 Things You Need to Know About Ozempic and Weight Loss

Saggy Skin

Close-up Of A Woman Holding Arm With Excess Fat On Grey BackgroundShutterstock

According to Dr. Decotiis, some people are complaining about having a saggy butt, face, or loose skin after rapidly losing weight, which has to do with fat loss. “Your skin stretches when you gain weight, so when you lose a lot of weight, sometimes your skin doesn’t fully go back to normal,” she says. “Think of a woman who’s pregnant. When she has a baby, sometimes her stomach takes time to go back to how it was before.” One way to mitigate this effect is by weight training during the weight loss process. “Additionally, as you age, you have less elasticity in your skin, and you cannot produce as much collagen. Your skin bounces back better when you’re younger,” she says.

💪🔥Body Booster: After losing weight fast, make sure to lift weights or do another form of muscle-strengthening exercise to avoid losing muscle.

Nutrition & Diet

5 Signs Your Metabolism is Damaged from Dieting

Kelsey_Kunik_graciouslynourished3
graciouslynourished/Instagram
Leah Groth
By Leah GrothApr 12, 2024
Leah Groth
Writer, Editor, and Content Creator
Leah Groth has decades of experience covering all things health, wellness and fitness related.
See Full Bio
Follow:
FACT CHECKED BY Tara Collingwood, ms, rdn, cssd, acsm-cpt
✓Fact-Checked

Our content is fact checked by our senior editorial staff to reflect accuracy and ensure our readers get sound information and advice to make the smartest, healthiest choices.

We adhere to structured guidelines for sourcing information and linking to other resources, including scientific studies and medical journals.

If you have any concerns about the accuracy of our content, please reach out to our editors by e-mailing editors@bodynetwork.com.

If you feel like your metabolism isn’t working efficiently, you aren’t alone. Kelsey Kunik, RD, is a nutritionist who tries to help people “overcome overeating without dieting.” In a recent Instagram video, she discusses metabolism and how yours could be damaged because of dieting. “Do you ever feel like other people are ‘blessed’ and you’re ‘cursed’ when it comes to your metabolism??” she writes in the beginning of the post, going on to explain why and what you can do about it. Body Network also consulted with our Resident RDN, The Diet Diva, Tara Collingwood, MS, RDN, CSSD, LD/N, ACSM-CPT, a Board Certified Sports Dietitian, co-author of the Flat Belly Cookbook for Dummies, to offer her input on the topic.

Some People Try Dieting to Speed Up Their Metabolism, But It Has the Opposite Effect

Kelsey_Kunik_graciouslynourished2graciouslynourished/Instagram

In the video, Kunik explains that oftentimes when someone believes their metabolism is damaged, they might go to the wrong extremes. “That might lead you to dieting to lose weight or speed things up, but the truth is that dieting, especially dieting on and off over several years, can have a massive impact on how efficiently you burn calories,” she says.

Here Are the Signs and Symptoms Yours Needs Help

Kelsey_Kunik_graciouslynourished1graciouslynourished/Instagram

“While this is NOT medical advice and it’s not the ONLY possible cause of these symptoms, your metabolism could use a little help if you experience any of these,” she says.

Holding Onto Extra Weight

Overweight unhappy asian woman extra heavy body cellulite sitting on bed at home. Upset oversized lady worry diet weight loss suffering from extra weight. Obesity unhealthily concept.Shutterstock

Are you feeling heavier than usual? The first sign is “holding on to extra weight,” says Kelsey.

Fatigue

Sleepy young woman drinking coffee, feeling tired, suffering from insomnia and sleeping disorder. Sad female sitting in modern kitchen interior, empty spaceShutterstock

The second sign your metabolism is damaged? “Feeling tired,” she says.

Constipation

Door handle open to toilet can see toiletShutterstock

Are you having trouble going to the bathroom? “Number three on the list is constipation,” she says.

Always Feeling Cold

Frozen. Sad latina female sit on couch at freezing cooled studio flat in warm cap and blanket shiver tremble with cold. Unhappy young lady spend time at home feel bad suffer of heating system problemsShutterstock

Are you getting the chills more than usual? The fourth sign your metabolism is damaged is that you are “always feeling cold.”

Hormone Imbalances

Depressed woman sitting alone on the bed with hands on head feel stress, sad and worried in the dark bedroom and low light environmentShutterstock

Are you feeling all over the place or unusually hormonal, even when it’s not that time of the month. Number five, “hormone imbalances,” she says.

The Answer: Feed Your Body with Nutrients

Girl holds a paper plate with healthy food sitting on the floor. Home delivery food. Healthy eating concept. When you stay at home.Shutterstock

What should you do about it? “And the answer to repairing your metabolism is NOT another diet,” she continues. “When your body is given nourishing food on a regular basis that’s balanced with high protein, fiber, quality carbohydrates, healthy fats, and plenty of fruits and veggies, it begins to trust that food is available and your metabolism can start to HEAL itself. Your metabolism will NOT improve when your body is in a constant flux of starvation and excess — as if you needed another reason to stop dieting!”

Related: This Is Exactly How to Lose Body Fat This Year

Why Your Metabolism Could Be “Tanking,” According to Collingwood

tara_collingwood6dietdivatara/Instagram

Collingwood agrees on all points. “All of these could be signs that your metabolism is tanking,” she says, offering reasons why it may be happening. “It could be from lack of physical activity, poor diet, eating too little, getting too little sleep, or a variety of other reasons,” she says. “When under stress, the body tries to hang on to what it has which means lowering metabolism to prevent weight loss and cause fatigue and other symptoms.”

💪🔥Body Booster: If you are struggling with your metabolism, resist dieting. Instead, try and take a more balanced approach to nutrition, allowing it to reset.

Nutrition & Diet

10 Signs You Aren’t Consuming Enough Calories

Female Customer Unhappy with the Dish Course in Restaurant. Depressed lonely woman suffering from appetite loss
Shutterstock
Leah Groth
By Leah GrothMay 06, 2024
Leah Groth
Writer, Editor, and Content Creator
Leah Groth has decades of experience covering all things health, wellness and fitness related.
See Full Bio
Follow:
FACT CHECKED BY Christopher Roback
✓Evidence-Based

This content references scientific studies and academic research, and is fact-checked to ensure accuracy.

Our team of licensed nutritionists and dietitians strives to be objective, unbiased, and honest.

We are committed to bringing you researched, expert-driven content to help you make more informed decisions around food, health, and wellness. We know how important making choices about your overall health is, and we strive to provide you with the best information possible.

The most common sign you are consuming too many calories is that you are gaining weight. But did you know that your body might be sending you signs that you aren’t taking in enough? Lexi Wright is a metabolism, menopause, and fat loss coach whose main goal is helping “women 40+ reset their metabolism, lose weight, improve energy.” In a new post, she explains that not eating enough can have an impact on your health. “I see this with women in their 40s and 50s all the time. They are on the eat less workout plan for losing weight, and it's not working for them,” she writes. “Our bodies are smart, and we need a certain amount of calories for our actual normal body functions.” Here are key signs you aren’t consuming enough calories.

You Are Always Cold

Frozen. Sad latina female sit on couch at freezing cooled studio flat in warm cap and blanket shiver tremble with cold. Unhappy young lady spend time at home feel bad suffer of heating system problemsShutterstock

Are you often feeling cold? It may be because your caloric intake is too low. “Your body is smart and its common response to inadequate calories is to conserve energy to maintain your body core temperature,” she writes.

You Are Always Tired

Female office worker in glasses rubbing tired eyes, exhausted from overworking, sitting at workplace in office.Shutterstock/Prostock-studio

If “you lack energy and feel exhausted all day,” it could have to do with your food intake. “Too low of calories and your body will not have the energy to fuel itself for daily activities,” she writes.

RELATED: Here Is How to Lose 15 Pounds in 45 Days

You Are Stuck in a “Binge, Restrict” Cycle

,,Food,Fridge, refrigerator ,coldShutterstock

Another sign? “You are constantly in a binge restrict cycle because the calories are so low and you trigger feelings of deprivation which leads to cravings and binging,” says Lexi.

Hair Loss

Millennial girl with hair loss problem looking in mirror at homeShutterstock

Losing hair is another sign you aren’t consuming enough calories. “Low calories can deprive your body of the nutrients it needs for a lot of body functions including hair growth and maintenance,” says Lexi.

Constant Hunger

Woman,Feeling,Hungry,Looking,For,Something,To,Eat,In,AmusementShutterstock

“You are hungry all the DAMN time even though you are eating a good amount of protein and fibre to fill you up,” is the fifth sign you aren’t getting enough calories. “Your body is very smart and is telling you something!” she says.

You Lose Weight Fast

Full length of excited Indian woman sitting on scales at home, overjoyed with success of her slimming diet, side view. Emotional Asian lady achieving her weight loss goal, making YES gestureShutterstock

A more obvious sign? “You drop weight fast. More than 0.5% of your body weight every week,” she writes. “Rapid weight loss can indicate an excessively low calorie intake, which may compromise your overall health and metabolism.”

RELATED: 20 Proven Tips to Lose Weight with the 12-3-30 Walking Method

Irregular Periods

Young woman suffers, writhes in abdominal pain lying on couch in living room at home interior. Acute pain in bloating pms. Teenage girl with pain problems bowel diseaseShutterstock

If “your period goes bye bye or is irregular,” it may be a sign you aren’t eating enough. “When our bodies are under stress it’s defense mechanism is to shut down things that take a lot of energy and having a baby is one of those!” she writes.

Mood Swings

Dark-haired girl covers her face with handsShutterstock

If you are experiencing mood swings “and can’t get motivated,” you probably aren’t consuming enough calories. “Low calories can impact your mood and mental well-being, leading to irritability, mood swings, and overall motivation,” she writes.

You Can’t Build Muscle

A woman rubbing her upper arm at the fitness gymShutterstock

“You have been lifting weights and you are not getting any stronger,” is another clear sign. “Muscle is expensive calorie wise to keep and build. When we don’t have the calories to fuel workouts and muscle growth this is one of the first things that go,” she writes.

Constipation

Door handle open to toilet can see toiletShutterstock

The last sign you aren’t consuming enough calories? “You are constipated all the time,” she writes. “Lack of calories usually means lack of nutrients including fibre. Proper digestion is how we clear out all the ‘STUFF’ having a bowel movement at least once a day is essential to overall health,” she maintains.

💪🔥Body Booster: Just as eating too many calories per day can negatively impact your overall health, not eating enough can too. Try and hit your daily caloric intake goals to maximize health.

Fitness & Workouts

10 Weight Loss Mistakes You Need to Stop Making

,Exhausted,Runner,Resting,After,Running,In,City, tired, hill
Shutterstock
Alek Korab
By Alek KorabOct 18, 2024
Alek Korab
Editor
Alek Korab is Founding Editor of Body Network
See Full Bio
Follow:
FACT CHECKED BY Christopher Roback
✓Expert-Recommended

We've consulted with our team of licensed nutritionists and dietitians to bring you informed recommendations for food products, health aids and nutritional goods to safely and successfully guide you toward making better diet and nutrition choices. We strive to only recommend products that adhere to our philosophy of eating better while still enjoying what you eat.

Many of us have stood in front of the mirror, promising ourselves that this time, we'll finally shed those extra pounds - and fast. However, the desire for quick results often leads to mistakes that can be counterproductive or even harmful. Read on to learn common pitfalls to avoid when attempting rapid weight loss, with insights from fitness and nutrition experts.

Setting Unrealistic Goals

Hand with Pencil making goals list to lose weightShutterstock

One of the biggest mistakes is setting unrealistic goals, such as aiming to lose 5 percent body fat in just two weeks. Blanca Garcia, RDN, cautions, "A 5% body fat loss in two weeks is not a recommendation I would make. The healthier, more achievable goal is to make lifestyle changes that are small but doable."

Falling for Crash Diets

Calories Nutrition Food Exercise ConceptShutterstock

Crash diets or extreme calorie restriction can be tempting for quick results, but they're often counterproductive. Fitness expert Jillian Michaelswarns, "When you starve the body, you're telling your body, 'Oh my god, food is really scarce.' This can lead to metabolic damage and the dreaded yo-yo effect."

Neglecting Exercise

Overweight guy sitting on the couch with remote in hand trying to watch some TV.Shutterstock

Contrary to popular belief, exercise plays a crucial role in weight loss. Michaels advises, "If you're trying to lose weight, it's like 80% exercise because you can't starve it off." Neglecting physical activity can significantly slow down your weight loss progress.

RELATED: I Lost 42 Pounds with These 6 High-Protein Meals

Ignoring Macronutrient Balance

Set of natural food high in protein on grey background, top viewShutterstock

Focusing solely on calorie reduction without considering macronutrient balance can lead to nutrient deficiencies and muscle loss. It's important to maintain a balanced diet that includes adequate protein, healthy fats, and complex carbohydrates.

Overexercising

young sports woman working out, running and feeling tired on treadmill in gymShutterstock

While exercise is crucial, overdoing it can be counterproductive. Garcia advises, "Setting overly ambitious goals with physical activity can lead to injury, but also can have feelings of despair if the goals are not met."

Neglecting Sleep and Hydration

Insomnia and social media addiction concept. Young woman uses smartphone while lying in bed at night, tonedShutterstock

Many people underestimate the importance of sleep and hydration in weight loss. Lack of sleep can disrupt hormones related to appetite, increasing the likelihood of overeating. Similarly, dehydration can slow down metabolism and lead to overeating due to thirst being mistaken for hunger.

Relying Solely on the Scale

Female bare feet with weight scale on wooden floorShutterstock

Focusing only on the number on the scale can be misleading and demotivating. Catherine Gervacio, registered dietitian, suggests, "Consider factors like energy levels, mood, sleep quality, and overall health as important markers of success."

RELATED: I'm a Petite Nutritionist and These 6 Signs Show You're Actually Losing Weight

Overlooking Muscle Mass

Happy elderly woman celebrating her fitness achievement after a great outdoor workout session, flaunting her strong bicep. Fit senior woman expressing her pride in her successful exercise routine.Shutterstock

Rapid weight loss often leads to loss of muscle mass along with fat. Gervacio advises, "Focus on your proteins and make sure you get the right amount and kind. Aim for a diet that includes a variety of nutrient-dense foods like fruits, vegetables, lean proteins, whole grains, and healthy fats."

Expecting Immediate Results

Unhappy young woman standing in front of a mirror and holding hands on her bloating stomach.Shutterstock

Expecting dramatic results in a short time can lead to disappointment and giving up. Garcia reminds us, "Weight loss that is sustainable for the long term requires changes that are lifelong and can only be sustained if those changes are something a person can actually do."

Ignoring Professional Guidance

Gym customer is getting advice and suggestion from her personal trainer for exercising plan program and getting her evaluation chart from sample blood test for her workout progress conceptShutterstock

Attempting rapid weight loss without professional guidance can be risky. Garcia emphasizes, "Rapid weight loss can be achieved in a safe and sustainable manner through direct work with a doctor and registered dietitian."

RELATED: Here Is How Much Weight You Can Really Lose on Ozempic, According to a Doctor

How to Lose Weight Sustainably

Healthy young woman weighing herself on scaleShutterstock

While the desire for quick weight loss is understandable, it's crucial to approach it healthily and sustainably. Avoid these common mistakes and focus on long-term lifestyle changes for the best results. As Gervacio says, "Understand that achieving long-term health and sustainable changes takes time. Be patient with yourself, and avoid self-criticism. Focus on progress rather than perfection!" And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week.

Nutrition & Diet

10 Worst Weight Loss Mistakes Experts Say You Could Make

Leah Groth
By Leah GrothJun 02, 2024
Leah Groth
Writer, Editor, and Content Creator
Leah Groth has decades of experience covering all things health, wellness and fitness related.
See Full Bio
Follow:
FACT CHECKED BY Christopher Roback
✓Expert-Recommended

We've consulted with our team of licensed nutritionists and dietitians to bring you informed recommendations for food products, health aids and nutritional goods to safely and successfully guide you toward making better diet and nutrition choices. We strive to only recommend products that adhere to our philosophy of eating better while still enjoying what you eat.

Are you trying to lose weight but aren’t really getting anywhere? According to experts, you might be going about your weight loss journey the wrong way. In fact, even some of the top diet and fitness experts have made weight loss mistakes themselves. Body Network spoke to a few trainers and nutritionists and asked them about the biggest missteps they took on their fitness journeys.

1. Going Overboard with Calorie Counting

CALORIE counting counter application Medical eating healthy Diet conceptShutterstock

While it is good to keep tabs on your food consumption, Risa Sheppard, Master Pilates trainer, creator of The Sheppard Method, advises not to go overboard. “Counting every calorie of every piece of food,” is one of the mistakes she made. “It became time consuming and frustrating.”

Related: I Lost Belly Fat & 17 Pounds With These 6 Simple Hacks

2. Starving Your Body of Carbs

Unhappy Woman refusing to Eat her Pizza Dish in a Restaurant. Disgruntled customer not liking the meal sending it backShutterstock

Mr. America Jason Kozma, a personal trainer in Los Angeles, reveals the biggest mistake he made while preparing for a bodybuilding competition. “I had gotten too heavy bulking up to add more muscle mass,” he explains. He spent four months dieting for a spring show “and still didn’t get in shape.” After a short break he reset his goal to a fall show and dove headlong into his diet. “I was using an extremely low carb approach as I felt I had too much fat yet to burn. What I actually did was I starved my muscles of carbohydrates for so long that at the end my body couldn’t assimilate carbohydrates and I couldn’t ‘pump u’ for the show,” he continues. “My body fat measured lower than ever for this show but I didn’t look as good as I had a year and a half prior at a higher body fat level. The net result was that I lost muscle using this approach: I was actually smaller and lighter than I was before the ‘bulk up.’” Note: He still won the show!

3. Doing Too Much Cardio

young sports woman working out, running and feeling tired on treadmill in gymShutterstock

Diet and fitness expert Adita Yrizarry-Lang, ISCA, NASM, ACE, AFAA, reveals that one of the biggest mistakes she made was doing too much cardio. “When I first started in fitness, this was the prescription…do a lot of cardio. The reality is that you burn more calories when you have muscle on your body, combining weights with cardio is the right way to do it,” she says.

4. Not Looking at Serving Size on Packages

Young woman label on pasta package while shopping food in supermarket.Shutterstock

Yrizarry-Lang claims that another mistake is only looking at calories on a package, and not the serving size. “We were mesmerized by the lo-cal labeling on a package,” she says. “Unfortunately, we never looked at the serving size and then came to realize we were ingesting too many calories at a time.”

5. Falling Victim to Low Fat, Highly Processed Foods

Young woman putting goods on counter in supermarketShutterstock

Just because something is low-fat doesn’t make it healthy. Yrizarry-Lang says that some people consume “too many processed carbs, because they are low fat.” While this might be okay for runners, going for 10 to 20 mile runs, “those carbs convert to fat,” for most of us.

Related: Alexia Clark Flaunts Chiseled Midsection and Reveals 3 Ab Mistakes You Are Making

6. Daily Weigh-Ins

point of view - closeup feet for asian woman measure weight on scaleShutterstock

Weighing oneself every single day is another mistake, says Sheppard. “It can be discouraging,” she explains. “Try to weigh yourself less and pay more attention to how your clothes are fitting. Remember muscle weighs more fat so if you are on an intense exercise regime the muscle you gain will trim in less but may not show on the scale.”

7. Crash Diets

I'll eat you tiny pea! Weight loss concept. Close up photo portrait of mad lady's eye looking at small one pea on large big plate on tableShutterstock

If a diet seems too good to be true, it probably is. “The all-time worst” mistake people make is going on crash diets. Why? You might “lose weight at the moment” but you will “gain it back with a few extra pounds,” says Yrizarry-Lang. “This slows down the metabolism and makes it even harder to lose weight at a later date.”

8. Focusing on Exercise for Weight Loss

Exhausted man resting after joggingShutterstock

One of the biggest mistakes people make is “thinking more exercise will cause them to lose weight,” says Sheppard. “80 percent is dieting and 20 percent is exercise,” she reminds.

9. Falling Victim to “Get Thin Fast” Scams

Lots of colorful pills and capsules for different symptoms. Selective focus, noise. Concept of health and medicineShutterstock

Sheppard strongly advises against any products or diet that claim to help with rapid weight loss. “Do not succumb to quick weight loss scams or dangerous pills. Remember Rome wasn’t built in a day and neither is weight loss,” she says.

Related: 15 Foods That Fight Fat

10. Comparing Yourself to Others

Shocked young woman wearing too big loose jeans after successful weight loss, posing and looking at her reflection in mirror with open mouth, copy spaceShutterstock

Remember that your fitness journey is your own and “comparing yourself to other people” will “only add to your stress and discouragement,” says Sheppard. “We are all built differently with different bone structure and hereditary genes. Love who you are inside and it will reflect on your outside.”

💪🔥Body Booster: Beware of low-fat, processed foods. Unless you run for 20 miles a day, you should probably pass on a highly processed energy bar – those carbs might convert to fat unless you are working them off.

Nutrition & Diet

She Lost 70 Lbs: 5 Things She Wishes She Knew

Nikki Madoch Nikki Gets Fit
I Lost 70 Pounds and Beat Binge Eating With These 6 Steps
Copyright nikkigets_fit/Instagram
Christopher Roback
By Christopher RobackApr 01, 2025
Christopher Roback
Professional Health, Science Editor and Writer
Christopher Roback is an experienced news journalist specializing in political, science, and crime news.
See Full Bio
✓Evidence-Based

This content references scientific studies and academic research, and is fact-checked to ensure accuracy.

Our team of licensed nutritionists and dietitians strives to be objective, unbiased, and honest.

We are committed to bringing you researched, expert-driven content to help you make more informed decisions around food, health, and wellness. We know how important making choices about your overall health is, and we strive to provide you with the best information possible.

Starting a weight loss journey can feel overwhelming and intimidating. We often focus on the wrong things and set ourselves up for disappointment. Nikki Madoch (@NikkiGetsFit) knows this all too well. As a self-described "nutrition athlete" with ASM CPT and CNC certifications, Nikki has shared her experience losing an impressive 70 pounds on the Weight Watchers program. Her insights might just be the perspective shift you need to make your own journey more successful and sustainable.

The Right Motivation Makes All the Difference

Most people start losing weight to look better, but that's rarely enough to stick with it long-term. "For so long, I just wanted to look better, have a flat stomach, and look like other people. That was all it was," Nikki admits in her post. She found out that feeling better physically became what truly kept her going, not how she looked, which completely changed her approach and results.

RELATED:8 High-Protein Foods with Nearly Zero Calories That Melt Fat

Health Benefits Show Up Quickly

The physical improvements from healthier eating can pop up much faster than you might think. "After just one week, I could not believe how much better I felt," Nikki says. She noticed huge differences in her energy and overall well-being after cutting out fast food and focusing on portion control and foods that actually nourished her body.

Feeling Good Trumps Looking Good

Lasting weight loss comes from caring more about how your body feels than how it looks. "What keeps me going is how good I feel when I take care of myself, eat healthy, nourish myself, drink enough water, get enough sleep, and exercise," Nikki points out. While looking better in clothes feels nice, it's the improved quality of life that really drives her to keep making healthy choices.

Body Image Issues Can Actually Increase

Surprisingly, losing weight doesn't magically fix body image issues and might even create new ones. "I didn't know that I would have more body dysmorphia as I lost weight," Nikki confesses. She caught herself becoming more critical and self-conscious about specific body parts during her journey than she had been at her heaviest weight.

RELATED:20 Foods You Didn’t Know Were Ultra-Processed

The Mental Game Gets Tougher

Weight loss demands as much mental strength as physical discipline, especially as you make progress. "It was a whole new mental game that I had to work through," Nikki says about dealing with increased body scrutiny. Learning to shift her focus back to health and strength rather than picking apart her physical imperfections became crucial for her continued success.

Don't Be Afraid to Use All Your Resources

If you're following a structured program, take full advantage of all the flexibility it offers. "I was too scared to use my weeklies," Nikki talks about her initial approach to Weight Watchers points. She later discovered that using all her allotted weekly points actually helped her lose more weight rather than slowing her down.

Strategic Indulgence Works Best

How you use extra calories or points matters more than whether you use them. "What worked best for me was using my weeklies on different snacks that I like—protein bars, nuts, peanut butter spread," Nikki shares. She found that spreading out enjoyable foods throughout the week worked better than saving everything for one big cheat meal.

RELATED:I'm a Nutritionist and These are the Best Banana Recipes For Weight Loss

Variety Prevents Burnout

Eating the same healthy foods over and over leads to boredom and eventually giving up. "It is very easy to get burned out of things, and it's very important to switch things up," Nikki warns. She learned to keep introducing new recipes, ingredients, and meal ideas to keep her plan interesting and something she could stick with.

Try One New Thing Weekly

Small changes make a big difference in keeping meals from getting boring. "Just trying to add a new recipe each week, just a simple recipe, so that I'm trying something new," Nikki suggests. This approach keeps meals exciting without becoming overwhelming or taking too much time.

The Scale Doesn't Tell the Whole Story

Weight is just one measurement and often a misleading one, especially when building muscle. "Weight and the number on the scale is not everything," Nikki insists. She weighs 190 pounds at 6 feet tall and feels healthier now than when she weighed less but had less muscle.

RELATED:What Happens When You Quit Soda, According to a Nutritionist

Progress Photos Tell a Better Story

Visual proof of body changes can be more motivating than scale numbers. "I'm actually really happy that I did start taking progress pictures from the start," Nikki mentions. These photos helped her see that she looked smaller at a higher weight due to muscle gain, proving that the scale wasn't telling her the full story of her success.

Embrace Multiple Ways to Measure Success

Relying only on weight can lead to frustration, especially during plateaus. "Having different ways to not focus so much on the scale to see your progress is so important," Nikki talks about. She figured out how to judge her progress through how clothes fit, strength gains, and overall wellbeing rather than obsessing over a specific number.

Final Word

Nikki's journey shows that lasting weight loss comes from focusing on health, enjoyment, and sustainable habits rather than just appearance or numbers on a scale. By shifting your perspective on motivation, measurements, and what truly matters, you can create a healthier relationship with food and your body that lasts far beyond reaching your goal weight. And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week.

Fitness & Workouts

Lose 20 Pounds in 90 Days With Expert Methods

Mateo Ruperti lifting_with_mateo
Copyright lifting_with_mateo/Instagram
Leah Suzanne
By Leah SuzanneApr 01, 2025
Leah Suzanne
Freelance Writer/Editor
See Full Bio
✓Evidence-Based

This content references scientific studies and academic research, and is fact-checked to ensure accuracy.

Our team of licensed nutritionists and dietitians strives to be objective, unbiased, and honest.

We are committed to bringing you researched, expert-driven content to help you make more informed decisions around food, health, and wellness. We know how important making choices about your overall health is, and we strive to provide you with the best information possible.

Are you frustrated with all the one-size-fits-all fat loss methods that don’t seem to work for you? One expert claims there are a handful of easy and effective methods you can choose from to lose weight. Mateo Ruperti is a fat loss coach who uses his LWM Blueprint to help “busy people lose 20 lbs in 90 days.” In a new post, he reveals five methods that you can use to drop weight fast. “How to lose body fat in 3 months,” he writes.

Method 1

His first method involves a lot of coffee and water. “Drink a lot of water, so your tummy will be filled with water and you won’t have urges to eat,” he says. Drink black coffee: Caffeine will give you energy and will manipulate your brain into thinking you are not hungry. Use this when having cravings.”

RELATED:8 High-Protein Foods with Nearly Zero Calories That Melt Fat

Method 2

The second method involves exercise and a calorie deficit. “Be in a slight calorie deficit of 200-300 calories. Use high dense food to make you feel like you are full without eating so many calories,” he says. Also, do cardio. “Walk about 10,000 to 15,000 steps everyday. Walking is the best form of cardio to burn calories.” A 2018 study published in the journal Obesity found a link between walking 10,000 steps a day and weight loss and weight management. Other studies published by the Journal of American Medical Association (JAMA) in JAMA Neurology and in JAMA Internal Medicine also linked walking 10,000 steps a day to less dementia and less cardiovascular disease overall, with less heart disease, less heart failure, and fewer strokes.

Method 3

The third method is following the 30-30-30 Rule. “Do 30 minutes of cardio after 30 minutes of waking up and then eat 30 grams of protein. This is one the fastest ways to burn fat!” he claims.

RELATED:20 Foods You Didn’t Know Were Ultra-Processed

Method 4

His final method? “Eat foods that are rich in protein,” he says, revealing the following recommendations:

  • Egg whites
  • Chicken
  • Beef
  • Broccoli.

RELATED:I'm a Nutritionist and These are the Best Banana Recipes For Weight Loss

Bonus Tips

He also offers some bonus tips

  • Stop drinking ALCOHOL
  • No soda, Starbucks etc.
  • Count your calories precisely for at least 6 days a week.
  • Sleep 7-8 hours a day for better rest and recovery.

And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week

Nutrition & Diet

8 Best Costco Foods for Losing Weight Shoppers Just Discovered

HAMILTON, CANADA - JUNE 29, 2017 Costco Wholesale storefront in Hamilton, Ontario, Canada. Costco operates a chain of membership warehouses, carrying merchandise at lower prices.
Shutterstock
Leah Suzanne
By Leah SuzanneApr 01, 2025
Leah Suzanne
Freelance Writer/Editor
See Full Bio
✓Evidence-Based

This content references scientific studies and academic research, and is fact-checked to ensure accuracy.

Our team of licensed nutritionists and dietitians strives to be objective, unbiased, and honest.

We are committed to bringing you researched, expert-driven content to help you make more informed decisions around food, health, and wellness. We know how important making choices about your overall health is, and we strive to provide you with the best information possible.

Costco is known for selling some of the most delicious but calorie-heavy items, including pizza dripping with cheese and toppings, substantial hot dogs, and larger-than-life muffins. However, it is also an excellent resource for anyone on a diet or trying to lose weight. Health experts, trainers, and influencers share their go-to weight loss finds at the warehouse daily. Here are the 8 best Costco foods for losing weight that shoppers just discovered.

Wild Caught Salmon

,Salmon,Fish,Fillets, protein, food, dinner​Amp Up Your Protein IntakeShutterstock

Tara Collingwood, MS, RDN, CSSD, LD/N, ACSM-CPT, a Board Certified Sports Dietitian and co-author of the Flat Belly Cookbook for Dummies, recommends stocking up on wild-caught salmon, either frozen or fresh, at Costco. “Wild-caught salmon is rich in Omega-3s for heart and brain health,” she told our sister site, Eat This, Not That!. “These healthy fats are essential as we age, helping to reduce inflammation and support cognitive function. Costco offers a variety of wild-caught salmon options that can be baked, grilled, or pan-seared for easy, nutritious meals.”

RELATED:20 Foods You Didn’t Know Were Ultra-Processed

Fairlife Nutrition Plan Chocolate Protein Shake

container,Fairlife, milk,grocery, store.food,shopping,supermarket​Fairlife: The High-Protein Milk Game-ChangerShutterstock

I, and lots of influencers and fitness pros, are obsessed with Fairlife Nutrition Plan Chocolate Protein Shakes. TikToker Ali Olson, who has lost 105 pounds, recently shared a post showing the protein-packed milk in a video detailing her daily diet. Collingwood is also a big fan of Fairlife milk products. “It is delicious and also has a higher protein content than ‘regular’ milk due to how they process the milk,” she says. “It is good for post-workout, on your cereal, in a smoothie, or just a glass with dinner.”

Organic Meat

Medium,Rare,Ribeye,Steak,,Herbs,Grass,Fed, Beefed,meat​Grass-Fed Beef: The Satisfaction SolutionShutterstock

Costco is an excellent resource for organic meat. “Would I rather eat grass-fed, organic meat all the time? Sure, but I’m not a gazillionaire. That’s why I tend to stock up on beef (usually steaks and chuck roast) as well as chicken (organic if I can find it) while I’m there,” writesRuth Soukup, a midlife health and mindset coach, in an Instagram post.

Kevin’s Natural Foods Cilantro Lime Chicken

Holly Hillyer lost 45 pounds and swears that Kevin’s Natural Foods Cilantro Lime Chicken is a must-buy. “Throw this over a bed of cauliflower rice for a quick meal,” she suggests about the paleo-friendly and ultra-clean meals that are easy to prepare and found in the refrigerator section of the warehouse.

RELATED:I'm a Nutritionist and These are the Best Banana Recipes For Weight Loss

Yasso Cookies n’ Cream Greek Yogurt Bars

Yasso Greek Yogurt Bars are a dessert that offers some health benefits. My daughter prefers Yasso Cookies n’ Cream Greek Yogurt Bars over traditional ice cream bars – and they cost a fraction of the price compared to Whole Foods or Target. Each bar is just 90 calories and offers 5 grams of protein.

Poppi Prebiotic Soda

IRVINE, CALIFORNIA - 6 SEPT 2024: Three cans of Poppi Prebiotic Soda on a bed of ice.

Shutterstock

There’s a reason Pepsi purchased Poppi Prebiotic Soda for nearly 2 billion dollars. The soda isn’t just delicious, the apple cider vinegar and gut-boosting beverage offers health benefits, including improved digestion. I always pick up a box of these on a trip to the warehouse.

Mush Overnight Oats

Los Angeles, California, United States - 08-16-2023: A view of a hand holding a package of Mush Oats, on display at a local grocery store.

Shutterstock

Don’t have time to make overnight oats from scratch? Keep a box of Mush Overnight Oats in your fridge. The individually packaged and portioned overnight oats are great for a quick but nutritious breakfast.

RELATED:What Happens When You Quit Soda, According to a Nutritionist

Tru Grill Grilled Chicken Strips

Grilled or roasted chicken breast, whole and sliced on a wooden serving plate​Greek Chicken BowlShutterstock

Keep pre-cooked, lean proteins on hand for easy and nutritious dinners that will fill you up. Hillyer also recommends Tru Grill precooked Grilled Chicken Strips. “Heat and top a salad for an easy protein with dinner. My kids also love these just dipped in ketchup,” she says. And if you enjoyed this article, don't missthese 8 High-Protein Foods with Nearly Zero Calories That Melt Fat.

Copyright 2025 Galvanized Media. All Rights Reserved. Body Network is part of the Dotdash Meredith Publishing Family.