What Happens to Your Body When You Stop Eating on the Go

Are you struggling to see results with intermittent fasting? You're not alone. Many people start their fasting journey with high hopes, only to hit frustrating plateaus. The good news? Most fasting setbacks come down to a few simple, fixable mistakes. Dr. Morgan Nolte, a board-certified clinical specialist in geriatric physical therapy and founder of Zivli, has identified the most common pitfalls that derail fasting success. With her expertise in metabolic health and weight management, she helps clients overcome these obstacles to achieve lasting results. Read on to discover how to avoid these common pitfalls and finally unlock the weight loss results you've been working toward.

What Is Intermittent Fasting?

Unlike traditional diets that focus on what to eat, intermittent fasting centers on when you eat. As Johns Hopkins neuroscientistMark Mattson explains, "Our bodies have evolved to be able to go without food for many hours, or even several days or longer." This natural fasting ability stems from our prehistoric ancestors, who often went long periods between successful hunts.

How Does It Work?

"After hours without food, the body exhausts its sugar stores and starts burning fat," says Mattson, who has studied intermittent fasting for 25 years. He calls this "metabolic switching." This differs from typical American eating patterns, where frequent meals prevent burning fat. "If someone is eating three meals a day, plus snacks, and they're not exercising, then every time they eat, they're running on those calories and not burning their fat stores."

You're Overeating Processed Foods During Your Eating Window

"Even keto or low-carb processed foods can halt your progress," warns Dr. Nolte in her post. She emphasizes that while intermittent fasting is powerful, what you eat matters just as much as when you eat. The golden rule remains: focus on real, unprocessed foods to optimize both weight loss and metabolic health.

You're Fasting Too Long Too Soon

Shocking your body with dramatic fasting windows can backfire. Dr. Nolte recommends gradually increasing your fasting period by 30-60 minutes rather than jumping straight to lengthy fasts. "Starting too aggressively often leads to a restriction mindset and eventual overeating," she explains.

You're Not Drinking Enough Water

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Many forget that we get significant hydration from food. "When fasting, you need to be extra mindful about water intake," says Dr. Nolte. She recommends drinking half your body weight in ounces daily, aiming for clear or light yellow urine as an indicator of good hydration.

You're Consuming Sweet Drinks While Fasting

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Even zero-calorie sweeteners can trigger insulin release. "Anything sweet, including alcohol and diet drinks, signals your brain that calories are coming," Dr. Nolte explains. This can increase hunger and disrupt fat burning, defeating the purpose of your fast.

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You're Skipping Electrolytes

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Dr. Nolte admits this was her own mistake for years. "Unflavored electrolytes during fasting can improve muscle recovery and overall energy," she shares. She recommends either using plain LMNT supplements or making your own mixture with magnesium, potassium, and sea salt.

You're Afraid to Exercise While Fasting

Exercise during fasting can be highly effective when done right. Dr. Nolte recommends Zone 2 aerobic exercise at about 70% of your maximal heart rate. "This level of activity is perfect for fat burning while maintaining muscle mass," she notes.

You're Eating Too Many Starches and Sugars

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"There are essential proteins and fats, but no essential starches or sugars," Dr. Nolte points out. To maximize fasting benefits, she advises reducing starchy and sugary foods even during eating windows, as these trigger the largest insulin responses.

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You're Fasting at the Wrong Time in Your Cycle

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For menstruating women, timing matters. Dr. Nolte recommends focusing fasting efforts during days 1-14 of your cycle. "The week of your period through ovulation is optimal for fasting," she explains, while suggesting more flexibility around ovulation and pre-menstrual phases.

You're Fasting Despite Poor Sleep

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Sleep deprivation increases hunger hormones, making fasting much harder. "If you're not getting at least seven hours of sleep, focus on improving that before extending your fasts beyond 14 hours," Dr. Nolte advises.

You're Being Impatient About Results

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"There is no entitlement in weight loss," Dr. Nolte emphasizes. Initial weight loss might be water weight as insulin levels drop, and that's normal. She encourages focusing on long-term health benefits rather than quick fixes, noting that sustainable results take time.

The Benefits of Intermittent Fasting

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The science behind fasting is compelling. "Many things happen during intermittent fasting that can protect organs against chronic diseases like type 2 diabetes, heart disease, age-related neurodegenerative disorders, even inflammatory bowel disease and many cancers," Mattson notes in his research published in the New England Journal of Medicine. Studies have shown improvements in memory, heart health, physical performance, and blood sugar control.

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Safety and Considerations

While intermittent fasting can be practiced safely by many people, it's not suitable for everyone. Mattson advises that "it can take two to four weeks before the body becomes accustomed to intermittent fasting." He notes that while initial hunger and irritability are common, many people stick with it after the adjustment period because they notice improved well-being. However, certain groups should avoid fasting, including children, pregnant women, people with type 1 diabetes, and those with a history of eating disorders. Always consult with your healthcare provider before starting any fasting regimen. And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week.

You feel hungry, so you eat. But are you even hungry? And if the answer is yes, is there any way to curb your cravings so you eat less? The answer is yes, according to Jillian Michaels. The Biggest Loser star and the celebrated trainer reveals what to do in a new viral YouTube video. “All right guys, I have been seeing a ton of questions on all my social channels from you guys and all my app forums about curbing your appetite right now,” she says in the clip.

Are You Actually Hungry?

“So my first question is, are you actually physically hungry?” she asks in her post. “Because curbing your appetite physically and managing emotional eating are not the same thing. So the first thing I want you to look out for is when was the last time you've eaten? Have you eaten in the last two hours? If you have, it's highly unlikely that you're experiencing physical hunger.”

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Are You Craving Something

Next question? “Does a Turkey sandwich sound good, or a steak or scrambled eggs, something that isn't salty or sugary? Does that sound appetizing to you?” she asks. “Because if it doesn't, once again, you're probably having cravings, but it's likely that your appetite has not kicked in.”

Do You Have Physical Signs of Hunger?

“Another question is, do you have signs of physical hunger? Are you lightheaded? Is your stomach growling? Do you feel dizzy? Do you feel weak? If so, yeah, your blood sugar could be low, but most likely, I'm guessing that's not happening,” she says.

You Can Trick Your Body Into Switching On Hormones That Make You Feel Full

“Let's say you are hungry, and in fact, that can happen when you're losing weight, right? Or you've lost a good amount of weight, and your body is like, Hey, hold on. You know, we're losing too much weight, and it starts to signal your hunger hormones. Well, appetite, in large part, is controlled by hormones. So how can we trick your body into switching on hormones that make you feel more full and more satiated and shut off the hormones that make you feel more hungry?”

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Blood Sugar Crashes Make You Hungry and Crave Crap

Once it is established that you are physically hungry, “one of the things we want to do is eat at regular intervals because we want to stabilize your blood sugar,” she says, discussing blood sugar crashing, which “can happen when you've run out of blood sugar because you haven't eaten for a while,” she says. “But a blood sugar crash is when we're eating a lot of refined grains and processed sugars. And what happens is we convert it into glucose, which is blood sugar,” she says. “So maybe for the glycemic index, how quickly food converts to sugar in your bloodstream will process grains and refined sugars. That happens really fast, right? So then insulin spikes and your pancreas releases insulin. Insulin is a hormone, and part of its job is to get sugar out of the blood and into the cells. And it dumps a ton of insulin because you've got a ton of blood sugar, this big blood sugar spike. And what it does, it does its job so effectively that all of a sudden you get a blood sugar crash, and it leads you to feel hungry and craving more crap.”

Try and Eat Every Three to Four Hours

“You want to eat every three to four hours, and you want to make sure you're getting balanced macros, proteins, healthy fats, and healthy carbs, healthy carbs being vegetables, whole grains, beans, and legumes. Yes, fruit is okay, but combine it with healthy fats, monounsaturated fats, polyunsaturated fats, avocado, olive oil, and things of that nature. Saturated fats are not the end of the world as long as they are not from processed meat, hydrogenated, fractionated, or filled with garbage and lean and clean protein. If you are vegan, you could use things like a hemp protein powder. There's a lot you can play with. But all three macros will stabilize your blood sugar. And your blood sugar is stable; it allows you to feel fuller for a longer period of time because we're not playing this hormone game with blood sugar crashes,” she says.

Also, Eat Lots of Veggies

“Another one is, how do we literally expand your stomach without giving you a ton of calories?” she continues. “When the stomach expands, it releases a hormone called leptin, and leptin says, ‘Hey, you're full chill out, right? Stop eating. You're good here.’ So you want to play this game called volume volumetrics, which basically means you're eating food that's going to expand your stomach but is very low in calories. And this is why I always say, Hey, if you're on a diet and you're counting calories, green vegetables are free food. Not the oil you put on it or the butter or the dressings, but green vegetables are free food because they're loaded with fiber, they have high water content, and they're going to make you feel way more full. They're very nutrient-dense, which is great, right? We want all those micronutrients, the vitamins and minerals from the food, but they're really low in calories. So a lot of vegetables, as much as you can. I like to fill up on salad and greens first and then go like if I have a burrito, but I'll have a Caesar salad maybe on the side, and then a chicken burrito. I end up eating half of my burrito. If I eat the burrito first, I eat the entire thing.”

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Drink Water Before Meals or Take a Fiber Supplement

Another trick is a big glass of water before you eat your food “because literally it's filling you up,” she says. “And here's an old school trick actually from the South Beach Diet from a gazillion years ago, a fiber supplement. So you can take a fiber supplement before you eat with your water, and it will literally expand in your stomach, make you feel more full, and it will slow down how quickly you turn your food in, into glucose, which helps to stabilize blood sugar as well, right?”

Another One Is Sleep

Another one is sleep. “You've got to prioritize your sleep seven to eight hours of sleep. When you don't sleep, your body is not producing enough human growth hormone. It's not producing enough of its leptin, which is the satiety hormone we just talked about. And conversely, it's releasing more ghrelin, which is a hormone that makes you feel more hungry, and more cortisol, which is a stress hormone that makes you store more fat and can increase appetite,” she explains.

Hydrate

“So often we can mistake hydration for hunger because when we're dehydrated, we feel fatigued, right? We're tired, we're feeling run down, and we can turn to food, thinking we need more energy when really we need to be hydrated. So you want to drink enough water until your pee looks like lemonade,” she instructs. “If it looks like apple juice, keep drinking. That's how you know you're hydrated.”

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Supplement If Needed

And finally, consider supplementing. “Even though this is the lesser of all the evils we've discussed, having micronutrient deficiencies can be mistaken by your body for cravings or for hunger. The right amount of micronutrients helps your body make the necessary hormones. It helps your body do everything. And one of those things is making the hormones you need, supporting your body's ability to do that. So consider supplementation,” she concludes. And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week.