I'm a Dietitian and These Are 7 Foods You Should Never Eat

As a Registered Dietitian Nutritionist and freelance nutrition writer, I love food—so I never say never when it comes to foods to avoid. However, with more than eight year’s experience in nutrition and dietetics, and as a fan of traditional Mexican and Salvadoran cooking, I can't help but value nutrient-dense, real foods over the fake stuff that can lead to weight gain and health issues. So when Body Network asked me to share "7 foods you should never eat," I had no trouble coming up with the following list. Avoid these for a healthier, happier life.

Processed Foods

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Processed foods are foods that have been modified in some way, this can be through prepping and freezing, canning, and drying. There are, however other ways of processing foods that are not as natural, like the addition of flavorings, dyes, preservatives, and addition of vitamins and minerals. These types of foods are usually higher in calories but lower in nutrient value.

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Refined Oils

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There is a large variety of cooking oils, all refined in some way. Oils are extracted from seeds, nuts, legumes, grains, and olives. These oils are extracted and refined either with chemicals or in some mechanical way.

Hydrogenated Fats

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These are liquid oils that are changed by adding a hydrogen molecule to make it into saturated fat, making a liquid fat into a solid fat. This aims to make a healthier oil spreadable or easily used for cooking. However, in this process of making solid fat from vegetable oil, trans fats are made, which have been shown to lead to cardiovascular health problems.

High Fructose Corn Syrup

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A cheaper way to sweeten packaged and processed foods, high-fructose corn syrup is a sweetener developed from the processing of corn starch. The Food and Drug Administration of the United States does not have proof that it is less safe than honey. However, when added to everyday foods and consumed frequently, the amount of sugar consumed daily can be so excessive that it can contribute to obesity.

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Fast Food

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Although fast food is typically convenient for many busy people and families, many of the foods are highly processed with preservatives, dyes, and flavorings, high in fat and carbohydrates with very little nutrient density.

Foods With MSG

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Monosodium Glutamate is a salt that when combined with an aroma, is used in foods to increase the savory flavors. MSG is generally recognized as safe to eat and very little evidence that MSG can cause health problems. However, we still don’t know the long-term effects of artificial additives on health.

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Artificial Sweeteners

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Sweeteners that are manufactured are thousands of times sweeter than sugar, but are used in less quantities to achieve the sweetness. These are now widely found in all types of packaged foods and fast foods. Some studies show that artificial sweeteners can affect gut health and disturb the way the body uses up sugar.

💪🔥Body Booster: Doughnuts may be delicious, but they’re not good for you. They’re full of sugar and refined flour, which quickly raise your blood sugar. Plus, they’re fried in oil, adding unhealthy fats. They lack protein, vitamins, and minerals. So, for a healthier diet, it’s best to skip the doughnuts.

Do you ever wonder what foods health experts avoid? Physical therapist and strength coachJeff Cavaliere educates his YouTube followers with the same knowledge he shares with his professional athletes and celebrity clients. In a recent video, he reveals key foods he avoids eating and that you should too if you are “looking to clean up your diet and remove some foods that are making you fat,” she says.

They “may be keeping you unhealthy,” and you don’t even know it, he maintains, “and we’re making our decisions based on science and the latest research that points us towards better food options,” he writes in the caption of the post.

Bananas

In the clip, he explains that he used to add bananas to his smoothies but learned that “bananas have an enzyme in it called polyphenol oxidase. It actually degrades polyphenols,” he says. “This was a human study that came out recently,” he says, noting that adding the fruit to berry smoothies decreased “metabolites of polyphenols.”

So, “if you're trying to get the benefits of blueberries,” you could be “undercutting your sole purpose by including a banana in that smoothie of yours.”

Whole Grain Bread

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Whole grain bread sounds healthy, but according to Cavaliere, it takes “a long time” for your intestine to digest it, “and we don't have enzymes that work very well for that,” he says. “That's why a whole grain is good; it's a delivery system for getting the food further down the intestine to feed your bacteria.”

However, “whole grain bread in the supermarket is not whole grain because the grains have been pulverized to smithereens,” he says. “Now you consume it, and the starches are immediately acted on by the saliva and the stomach. And now you liberate all of that glucose, and it goes via the portal vein to the liver, generates an insulin spike, and you're off to the races in terms of chronic metabolic disease.”

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This Canned Soup (But It's Personal)

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Next up, white bean soup. He explains that it’s “a very personal choice” of his but stems from getting a norovirus that induced vomiting. “Unfortunately, every single time that I see white bean soup to this day, I get nauseous, and I wanna throw up,” he says. However, canned soups, in general, aren’t great for you, he explains.

“If you look at the amount of sodium that's contained in a canned soup, you might run away and hide as I have forever, and don't fall for the label lies where they make you think that there are only 800 and 900 milligrams of sodium in that can of soup because it is for two servings and nobody eats just half a can,” he points out. “It's all due to the preservation that's required to make canned foods last for a long time,” he says. “The bottom line is soup is an amazing addition to a healthy meal plan that actually gives you a convenient way to get the vegetables in a day that you might be missing right now. But you gotta make sure you're making it yourself, and you're not just relying on the cans on a shelf.”

Artificial Colors

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The next one is artificial dyes, “you know those colors of the rainbow with a number attached to it at the end, red number 40, blue number one, yellow number five, or number six,” he says. “The bottom line is, guys, you should look to avoid these at every single turn.”

He notes that “there is some scientific literature linked to increased hypersensitivity and hyperactivity in kids” and “beyond that, there are immunosuppressive effects that have been linked to these dyes, supposedly even at safe levels, whatever that might be, or even carcinogenic links that have suggested that long-term use of these could lead to cancer.” He doesn’t want to “name names, but read the back of your label,” he says.

Farm Raised Salmon

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The next item is farm-raised salmon. “The natural color of farm-raised salmon is actually this very pale, almost white, but the way that they make it look like this is through the inclusion of some of the very same food colorings in the feed that they supply these farm-raised fish,” he explains. “Once again, the recommendation is to always seek out whatever it is you're eating in its most natural form.

Wild-caught fish is going to be better for you than farm-raised fish every single time. The bottom line is to make sure you're also getting it from a reliable source. Because with all fish, no matter whether they are farm raised or wild caught, you're still going to have to be concerned about heavy metal contents in high levels of mercury.”

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Yogurt

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“Yogurt has active cultures, and active cultures help populate the intestine with good bacteria. The question is, if these foods worked, why would you have to keep eating them? If they're live cultures, they reach the intestine, which is nice and dark and murky, and certainly bacteria are growing in there. Why don't they just set up shop? And the answer is because they're not living anymore. They died,” he says.

“That's the reason why you needed them is because your own died because you have an inhospitable intestinal environment. So you don't need a probiotic. You need something that will let the bacteria grow. You need a prebiotic. Well, what's the prebiotic that's in real food fiber? It's been taken out of processed food,” he says. “I will continue to eat yogurt only because I do believe that I'm getting that prebiotic portion of the equation right.

By eating lots of fiber every single day, you can even go back to the whole grain bread. If you're getting things like that right, and you're eating enough of the vegetables, not the canned kind, but the regular vegetables, you should be providing your body with enough of the fiber to create that environment that's necessary for the good bacteria colonization of your digestive tract.

So even though the yogurt portion of my diet may not really be hitting it out of the park, and I might actually be providing myself with a bunch of dead bacteria in the process, I still think that, as he said, the most important part is getting the fiber portion down to create a better environment for the yogurt that you are eating. Therefore, continue to eat your yogurt, but make sure you're not avoiding your fiber.” And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week.

They're in your kitchen right now. Foods you eat every day, perhaps even foods you think are healthy. But these everyday staples might be undermining your health without you realizing it. Dr. Anthony Balduzzi, founder of The Fit Father Project and The Fit Mother Project, has helped over 30,000 families transform their health through proper nutrition. After losing his father at a young age, he dedicated his life to studying health and nutrition, earning degrees from the University of Pennsylvania and a doctorate in naturopathic medicine. "These foods are like landmines when you're out in the world," Dr. Balduzzi warns. Here are the top 10 foods he says you need to watch out for – and what to eat instead.

Store-Bought Chips: Your Daily Diet Destroyer

"Chips are literally the living definition of empty calories," Dr. Balduzzi highlights in his post. Just three ounces of chips weekly adds over 24,000 calories to your diet annually – equivalent to about seven pounds of fat. The combination of low-quality potatoes, inflammatory oils, and excessive salt makes them particularly harmful. Instead, try brands made with almond or cassava flour and avocado oil, or make your own apple or zucchini chips at home.

Non-Organic Bread: The Pesticide Problem

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"If you're eating non-organic bread, your bread is sprayed with glyphosate, which is also known as Roundup," Dr. Balduzzi reveals. This pesticide can damage your gut microbiome and potentially cause various health issues. The solution? Switch to organic sprouted bread like Ezekiel Bread or organic sourdough, which offer better nutrition and are often easier to digest.

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Commercial Baked Goods: The Thyroid Disruptor

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Those tempting pastries and donuts aren't just sugar bombs. "These bromides actually get into your thyroid gland," Dr. Balduzzi explains, "and block the absorption of iodine, leading to a sluggish metabolism." Many commercial baked goods contain these thyroid-disrupting compounds. Instead, opt for healthier breakfast options like avocado toast on organic bread or egg-based recipes.

Cream-Based Pasta Dishes: The Hidden Calorie Trap

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"Even a cup of chicken Alfredo has about 500 calories," warns Dr. Balduzzi, "and let's be honest, this stuff's so good, you want to eat six cups." His solution? Choose organic wheat or legume-based pasta with low-sugar marinara sauce instead. The lycopene in tomato-based sauces offers additional health benefits for vision and overall health.

Fried Fish and Chicken: The Heart Risk Factor

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The evidence is clear: eating fried fish just once weekly increases heart failure risk by 48%. "Fried foods are toxic for your cardiovascular system," Dr. Balduzzi states. The high-temperature frying creates inflammatory compounds that damage your arteries. Instead, opt for baked, grilled, or air-fried preparations.

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Processed Meats: The Cancer Connection

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"If there is one resounding thing that nutritionists agree on, it's that processed meats are bad for you," Dr. Balduzzi emphasizes. Hot dogs, sausages, and deli meats contain nitrites and nitrates that can increase cancer risk, particularly colon cancer. Choose whole cuts of meat instead, like chicken breast or grass-fed beef.

French Fries: The Aging Accelerator

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"When we take carbohydrates like potatoes and cook them on high heat with vegetable oils, it creates compounds called acrylamides," Dr. Balduzzi explains. These compounds accelerate aging and increase cancer risk. His alternative? Bake sweet potato wedges with olive oil and seasonings for a healthier version of this popular side dish.

Excessive Dairy: The Addiction You Didn't Know About

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"Dairy has a compound called beta casomorphine, which is a natural opioid," Dr. Balduzzi reveals. This explains why we often feel good after consuming dairy – and why it can be addictive. He recommends limiting dairy to occasional use and choosing fermented options like kefir or Greek yogurt when you do indulge.

Processed Plant-Based Foods: The False Health Hero

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Not all plant-based foods deliver on their healthy promise. "What's not awesome is a lot of these fake foods that are trying to be vegan," Dr. Balduzzi cautions. Many contain pesticide-sprayed soy protein and artificial additives. Instead, choose whole food plant-based options like black bean burgers or vegetarian chili.

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Sugary "Health" Drinks: The Wellness Impostor

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"These things are glorified sugar shots," Dr. Balduzzi warns about supposedly healthy fruit drinks, noting that many contain 30-40 grams of sugar per serving. Despite their promises of vitamins and antioxidants, these drinks can seriously impact your health. Stick to whole fruits for natural sweetness and nutrients, or make fresh vegetable-based juices at home. And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week.