50 Things Nutritionists Never Eat—So You Shouldn’t Either
Updated: Oct. 30, 2019
Want to know what the experts avoid? Here's the list of foods, processed goods, ingredients, and chemicals that nutritionists won't put on their plates.
Artificial sweeteners
A grande iced coffee with skim milk and two Splendas, please? Think again—and hold the sweet stuff. “I do not think there is sufficient evidence to prove that most artificial sweeteners are safe for consumers, so I prefer to stay away from them and indulge in the real thing [sugar] occasionally and mindfully. Plus, there’s a plethora of research that shows how consuming diet beverages may counter-intuitively lead to weight gain, which can increase your risk of chronic diseases like diabetes and heart disease,” registered dietitian and nutritionist, Chelsey Amer says.
Microwave popcorn
Love to curl up in front of The Voice with some vino and a buttery bag of popcorn? Resist. “I once ripped open an unpopped microwave popcorn bag and I haven’t eaten it since! There are too many artificial chemicals used in the flavourings inside the microwavable bag and I prefer to avoid overly processed products like this as much as possible,” Amer explains. But if you’re pop-crazy and can’t stop, she suggests making your own with popcorn kernels, a brown paper bag and olive oil with a touch of salt. There are also plenty of other healthier ways to flavour popcorn.
Processed deli meats
While it’s super-easy to make a turkey club when you buy deli meats in bulk on Sunday for your meal prep, there may be some dangerous ingredients lurking in those slices. “Processed deli meats can contain a wide variety of additives from nitrates to carrageenan that can increase inflammation in the body and have even been scientifically linked to increased risk in colon cancer,” says Megan Faletra, MS, an integrative dietitian nutritionist, certified yoga Instructor, and founder of The Well Essentials. Opt for organic, nitrate and antibiotic free deli meats.” You should also avoid these foods that can make you age faster.
Reduced-fat peanut butter
You might think you’re doing your body good by getting the low-fat jar; you’d be better off going full fat. “While regular and reduced-fat peanut butter contain roughly the same amount of calories, the reduced fat varieties typically contain more added sugar or artificial sweeteners to improve the taste,” says Faletra. “The fat found in peanut butter is healthy for our bodies, so stick to the natural full-fat peanut butters.” Here are some more food habits nutritionists wish you’d give up.
Margarine
If the dairy-free life isn’t for you—we feel ya—but you’re a waistline watcher, you might be tempted to reach for the “healthier” margarine. Hold that thought: “While many margarine brands are beginning to remove the trans fats from their products, most margarines rely primarily on highly processed vegetable oils (particularly soybean and palm oil),” Faletra says. “Choosing grass fed organic butter in moderation is a much better option for our health as these butters contain high-levels of heart healthy omega-3 fatty acids.”
Most frozen meals
While nutritionist Ha Nguyen, RD, used to nom on frozen meals as a kid—nearly every day after high school—today, she wouldn’t touch one with a 10-foot pole. Why? She explains, “Most prepackaged frozen meals are overly processed, made with refined flour, high in sodium, and full of additives and preservatives. All things that are not good for your body.” Here’s help cutting back on processed foods.
Pop Tarts
You might remember these commercials when you were in middle or high school—and maybe even argued with your pals over which flavour was the best—Nguyen recommends keeping ’em out of your shopping cart next time you’re at the store. “You mind as well send your kid off to school with a candy bar for breakfast. If you simply look at the first few ingredients they consists of refined sugars including corn syrup, high fructose corn syrup, dextrose, and sugar,” she says. Opt for these healthier breakfast ideas instead.
Cheese in a can
Though arguably super fun to play with when you’re 16, as far as a nutritional value, there’s not much this canned faux-dairy can offer you. “Cheese spread is highly processed with very little actual ‘cheese’ in it,” says registered dietitian and nutritionist Michelle Jaelin, RD. It comes with a laundry list of artificial ingredients and colours that I don’t feel comfortable eating. It is called plastic cheese for a reason! If I want to eat cheese, I eat the real thing,” says. Not sure how to portion control? Here’s what 100 calories of cheese actually looks like.
Boutique fruit juices
While that carton might claim to give you the vitamins and minerals you need, registered dietitian and nutritionist Andy De Santis, RD, says fruit juices—even the boutique ones—are a slippery slope. “The alarming trend of expensive juices is concerning. These products are generally packed in calories and they won’t keep you feeling full or provide anywhere near the full nutritional benefit of eating whole fruits and veggies,” he says. “For reference, eating an apple, orange and banana would take me 10 minutes. Drinking them in a juice—maybe 10 seconds?” That’s a lot of calories in less than a minute. And celery juice!? Don’t bother according to these experts.
Sausages, hot dogs
Take yourself out to the ball game, but skip the hot dog. You might be better off with a brewski and a bag of peanuts. “Not only are hot dogs high in fat and relatively low in protein, which is the exact combination you don’t want in your meat, but they are generally chock-full of sodium, which none of us need more of,” De Santis says. “The icing on the cake? There is a growing body of evidence that connects eating processed meats with an increased risk of cancer in the digestive tract.” These are the clear signs you’re eating too much salt.
Cheese
Say it isn’t so! While everything in moderation is a good rule of thumb for almost anything, De Santis put cheese on the naughty list because there are better ways to get calcium. “Cheese is generally high in calories, saturated fat, and sodium, all of which we need to cut back on. You are better off with a low-fat milk, a soy or almond alternative, or vitamin D-fortified yogurt. Don’t forget that nuts, seeds, legumes and dark leafy greens also contain calcium.”
Spam
You may want to pass on meat that comes from a factory instead of a butcher. “Preservatives, sodium, and uncertainty of the meat’s origin are three things that make me worry,” says registered dietician and nutritionist Gabriella Vetere, RDN. “Choose meat that your body can recognize, not one full of chemicals and preservatives,” Here are the foods you should never reheat in the microwave.
Ramen noodles
Your penny-pinching, hungover, inner college student may be weeping, but your body will thank you when you avoid this sodium pit. Exercise physiologist and nutritionist Rachel Straub, MS, recommends steering clear of these packaged goods because they’re loaded with salt and very little, if any, nutritional value.
Lunchables
They might seem like a breeze when you’re in a bind with no time to pack a snack for your kiddo, Straub says to try to refrain. “Since they have processed meats full of nitrates, refined grains, and candy, of course, this just isn’t a healthy choice,” she says. Try these healthier lunch ideas instead.
Blended fruit yogurts
The commercials are catchy—and they may bring back fond memories of snacking as a kid—but when it comes to getting the essential nutrients that yogurt is meant to deliver, most of blended fruit yogurts are a bad idea. As Straub explains, “It is basically dessert for breakfast. Nearly 50 percent of the calories can come from added sugar, so they just aren’t a healthy choice. I would much rather have a plain yogurt with a piece of real fruit or any of these healthy toppings.”
Doughnuts
Your Instagram feed might deliver a different message about these powdered (and sometimes rainbow-colored) haloes of dough, but that dozen you pick up before a Monday morning meeting is doing damage, says personal trainer, author, nutritionist, and health and wellness coach Jamie Logie. “Doughnuts are made of refined (possibly GMO) white flour which is super high glycemic.” That means it causes sudden spikes in your blood sugar. “And they’re deep-fried in artery clogging and cancer causing trans fats and covered in sugar. They won’t fill you up, make you hungrier and are filled with pretty much the worst ingredients out there.” Here are all the nutritionist-approved snacks you can buy anywhere.
Fast food burgers
The healthiest part of those kid meals you used to beg your parents for when you were coming home from baseball practice? Probably the plastic toy. Logie says that while making your own patty on the grill at home can be a good nutritional choice, the one from the fast food window is questionable. “One hamburger patty can be made up of dozens of different cows that come from feed-lot, confinement-based living. They are pumped full of hormones, have high levels of inflammation and are raised on some pretty horrific feed,” he says. “You then have a high starch white flour bun and then depending what you have on it can contain inferior bacon and essentially plastic processed cheese.” And here’s what you need to know about grilled fast food.
Movie theater popcorn
Like peanut butter and jelly, toast and butter and macaroni and cheese, some things just seem like they were meant for one another. Though it’s second nature to grab a can of buttery-salty goodness while you check out the latest blockbuster, Logie challenges you to resist. Large sizes at theaters can contain over 1000 calories and 40 grams of fat—and that’s without the butter topping, Logie says. For an alternative, pop your own on the stove top with some olive oil and salt, and sneak it into the theater. (We promise not to tell!) You can also flavour your popcorn with these healthier alternatives.
Raw oysters
Though oysters have an aphrodisiac reputation and can really hit the spot with a glass of white wine on a sunny day, nutritionist Jennifer Bowers, PhD, RD shies away from the slimy mollusk for the threat it can pose on your digestive system. “There are so many potential food-borne illnesses are associated with undercooked seafood—hepatitis A and noroviruses, specifically. Oysters commonly carry Vibrio vulnificus and Vibrio parahaemolyticus,” she explains. “Having said that, I think oysters taste horrible (personal opinion!), so it’s certainly not worth the risk for me. If you’re going to eat oysters, switch from raw ‘on the half shell’ variety to cooked to lower your risk of getting sick.”
Regular pop
You probably don’t need us to tell you that even an eight-ounce glass of any pop is bad news for your bod. Just in case you need the reminder, though, Bowers explains just how bad of an idea drinking liquid calories really is. “The sugar load in just one serving is simply not worth the glucose rush, mood issues, headache, and calorie bomb. The huge intake of pop in this country, coupled with a sedentary lifestyle, is strongly associated with the rising obesity epidemic,” she explains. Here’s what happens one hour after you drink a can of pop.
Fat-free packaged foods
Don’t allow yourself to be fooled by fad ‘diet’ foods, says nutritionist Rima Kleiner, MS, RD. Though it might be a smart marketing move on the part of major food corporations, labels like fat free, sugar free, and anything free—are deceptive. “Even after years of research showing us that our bodies need healthful fats, I still hear clients who consider packaged ‘fat free’ foods the pinnacle of healthy eating,” says Kleiner. “But many of these packaged products that should naturally contain fat (think cookies, crackers and bars) replace the fat with sugar, which means you end up with a cookie or other product that contains less fat, maybe a few less calories, but with little to no redeeming nutritional qualities,” she explains. “If I’m craving something sweet, I try to make my own so I can use healthful fats like olive oil, flax seeds and avocadoes, or I will just buy a single-serving brownie or cookie from a good bakery to share with my husband or kids.”
Pretzels
Don’t tell the street vendors in New York City, but their sought-after midtown snack is actually pretty terrible for the tourists. Registered dietitian Cara Walsh explains: “Pretzels are basically made out of sugar—simple carbs. The refined-carbohydrate product contains no nutrients that are beneficial for health plus they aren’t satisfying, which is why so many people tend to overeat them.” Here are some other unhealthy foods you’ve been tricked into thinking aren’t so bad.
Rice cakes
Once a supposed diet hero, these carb bombs are finally getting the shade they deserve. “Rice cakes are made from a specific carbohydrate that skyrockets your blood sugar,” says Walsh. They still hold a fascination for the calorie conscious, but Walsh is begging everyone to reconsider. Here are the foods nutritionists never eat at buffets.
Fruit canned in syrup
You could swap a slice of cake for fruit cocktail and your body wouldn’t know the difference. “Fruit is naturally sweet enough on its own,” explains registered dietitian and nutritionist Amy Gorin, MS. The amount of sugar in the fruit plus the syrup could put most desserts to shame. “If you’re shopping for canned fruit, you can absolutely find fruit that doesn’t contain added sugar, such as varieties canned in water or juice.”
Boxed cereals
Easier than whipping up an omelette and faster than brewing a cup of coffee, cereal is a breakfast favorite. But when it comes to offering the vitamins and minerals your body craves to start the day right, registered dietitian and nutritionist, Gisela Bouvier, RDN, advises stepping away from the box. “Dry cereals were created to be easy breakfast foods targeted to kids. However, cereals are very high in carbohydrates and offer very little, if any, protein and heart healthy fats. Most also have a lot of added sugars and lack fiber,” she explains. “As a dietitian, I never recommend dry cereals to clients. Instead, I recommend nutrient-dense complex carbohydrates, such as slow-cooked oatmeal or whole-grain toast.” Check out these healthy foods that will help keep you regular.
Regular peanut butter
Forget the uptick in peanut allergies in recent years, or the fact that some folks report increased acne breakouts after eating some PB, there’s even more of a reason to pass on this nut butter, according to Bouvier. Or at the very least, be a lot more selective about what you buy.
“While it does contain heart-healthy fats and is a quality plant-based protein, it is important to know that not all peanut butters are created equal. Most commercial peanut butters contain added sugar and oils, particularly partially hydrogenated oils. Partially hydrogenated oils are another name for trans fat, which have been linked to cardiovascular disease and other diseases. Unfortunately, when there is less than 0.5 grams of partially hydrogenated oils per serving in a food item, manufacturers are not required to put trans fat on their food labels,” she explains. “As a dietitian, I recommend to read the list of ingredients when purchasing peanut butter or any nut butters in general. When possible, simply look for ‘peanuts’ in the ingredient list or ‘peanuts, salt.'”
Frozen diet dinners
It’s tempting—especially when you get home late and the kids still need a baths—to defrost a frozen-food meal. The convenience isn’t the question, but the nutritional value definitely is. “Many frozen diet dinners claim to be low calorie and healthy. However, most are loaded with sodium and artificial ingredients, and they are also light on the nutrients,” Bouvier says. Feeling bloated? Here’s how to know if it’s IBS.
Cheese-flavoured snacks
If you find yourself drawn to cheese-flavoured anything, you’d be better off reaching for the real deal instead. Cheese-flavoured snacks are full of chemicals, says registered dietitian and nutritionist, Ashvini Mashru. “While you can find plain potato chips cooked in sunflower oil, cheese-flavoured snacks are packed with fat, MSG, and artificial flavours and colours. The ingredient list itself explains why a plain potato chip cooked in sunflower oil is many times better than any extruded cheese snack,” she says.
High fiber bars
When you’re traveling and trying to keep to your diet (trying to resist that pack of cookies offered to you 10,000 feet), maybe you reach for that high fiber bar you packed to bolster your will power. While Mashru understands the appeal, it’s actually not a good idea to let a bar take the place of a well-balanced snack that offers protein and healthy fats. Mashru says that really, these popular are “actually candy bars in disguise.” Instead, snack on these healthy foods you can find in an airport.
Food dyes
These mysterious ingredients aren’t really linked to weight gain, but nutritionist Julie Pech warns that anything not natural can be tricky for your body to digest. About eight years ago, Pech discovered she was allergic to food dyes. Anytime she would eat or drink something that contained a food dye, she’d become depressed within 24 hours. “I know when I’ve messed up because my mood will change for no reason. Usually everything is back to normal in a day, once my body has a chance to get rid of it. Many people are allergic to food dyes, and I’m a big advocate for clean-eating,” she says.
Wheat
Though there is a trend toward cutting out gluten to shed a few pounds or to feel healthier and thinner, many people suffer from gluten-intolerance or even worse, Celiac disease. For Pech, her son’s allergy to wheat is what prompted her to cut out this ingredient from her diet. “I stopped eating wheat with him because he was only 8 and was convinced his life would end if he couldn’t have pizza (that was before gluten-free pizza),” she explains. “I told him we’d do it together to make it easier for him. Once I stopped, I noticed my mind was much clearer and I had more energy, so I kept going with the wheat-free diet and I love it.” Make sure you know the potential dangers of a gluten-free diet.
Frozen breakfast sandwiches
We’ve all seen the commercials where an anthropomorphic sun promises tons of energy after wolfing down a breakfast sandwich. Don’t fall for this sandwich scam: “These little buggers can actually raise LDL cholesterol levels—the bad cholesterol—and lower good HDL cholesterol, which increases the risk of the number one cause of death in this country: heart disease,” explains registered dietitian Cassandra Golden MS, RD. “There are absolutely no health benefits of trans fats, and are used by food manufacturers to improve texture, shelf life, and as a less expensive alternative to butter or lard. Trans fats earned the nickname ‘bad fats’ for good reason, with our past president declaring them a threat to public health!”
Non-fat salad dressings
So you’re faced with a choice: Do you go for the regular dressing on your salad or the non-fat? Actually, you’re better off making your own olive oil-and-red wine version. “The fat, especially something like olive oil, can actually help you better absorb nutrients from the vegetables in your salad,” says registered dietitian Tanya Freirich, MS, RD. “Also, when the food company takes out the fat, they usually add a lot of sugar or man-made ingredients to achieve a similar taste. Healthy fats like olive oil, avocado, and nuts are an important part of a well-balanced diet.” And here are the healthiest foods at the farmer’s market.
Sugar-free desserts
The best news to come out of the dietary revolution of the last decade or so? Probably the condemnation of fat-free and sugar-free foods. You have full permission from those who know best to have an honest-to-goodness hunk of cake instead of something silly (not to mention supremely unsatisfying) like a sugar-free pudding. “I’d rather have a small amount of a natural sugar like honey or brown sugar than the processed facsimile of a dessert like a sugar free cookie or sugar free candy,” Freirich says. “The real dessert satisfies my sweet tooth with just a small portion, whereas the sugar-free option never really hits the spot. Eating sugar or fat in moderation can be a part of a healthy, well-balanced diet, and I’d rather eat whole, natural foods than processed ones.” Here are the sneaky sources of added sugar you might be eating without knowing it.
CAFO beef and chicken
It stands for concentrated animal feeding operation, and it means just what it says: The animals are crowded together and treated poorly. This is why it’s not just the source of tomato sauce, yogurt, and other packaged goods that need your attention, explains Karen Brennan, MSW, CNC: Meat need watching as well. “Animals need to be eating what is natural to them, and they need to be outdoors with room to roam in a stress-free environment,” she says. “Confined animals contain more omega 6’s, which are inflammatory. Grass-fed animals that are pasture raised have more heart protective omega 3’s,” says the board-certified holistic nutritionist and herbalist. “You are not only what you eat, but what your food eats. So, what did that chicken eat? What did that cow eat? Was it GMO grains? Were they injected with growth hormones and antibiotics? What impact will this have on your body over time after you consume these foods day after day, year after year?
Pasteurized dairy
Fun fact: humans are the only species that consume dairy post-infancy. While babies might need the enzymes from milk to build their bones and immune system, once you’ve grown, the benefits don’t always outweigh the drawbacks. “The main reasons why I do not consume traditional milk is because of the hormones injected into these cows, the GMO unnatural corn/grain based diet they are fed,the antibiotics these cows are given and because pasteurization destroys good microbes and enzymes that milk would otherwise contain,” Brennan says. These are the 10 questions nutritionists get asked the most.
Skim milk
Brennan says skim milk would never be on her breakfast table, no matter what. “The fats in milk build and balance the nervous system. The fat also acts as carrier for the fat-soluble vitamins so that these nutrients get to where they are needed. Personally, I would opt for goat milk instead since it is easier to digest and has fewer problematic proteins than does cow milk found in the United States. Also, it’s a myth that you have to eat dairy in order to meet your calcium needs! Your bones are made up of much more than just calcium and you can meet your calcium needs on a plant-based diet.” These foods have more protein than an egg.
Canola oil
Yes, canola was a good guy, once upon a time. We fried with it, made cakes, used it in dressings. “Made from rapeseed, most canola oil is genetically modified,” explains functional diagnostic nutritionist Cate Ritter. “Like most vegetable oils, canola is highly processed, refined, bleached and deodorized, which adds toxins and removes nutrients including the omega-3s. The manufacturing process makes it partially hydrogenated.” These are the organic foods nutritionists don’t waste their money on.
Non-organic corn and products made from corn
What does this include? Ritter says “corn oil, high-fructose corn syrup, corn syrup, cornstarch, dextrose and maltodextrin.” All of these sneaky ingredients are hanging out in many processed foods, and corn is the second-most common GMO that’s dangerous for your health. Check your labels—all of them—before letting food into your shopping cart.
Refined grains
Even if your Thai takeout doesn’t feel complete without rice; neither does Chinese food without noodles. Nonetheless, you’re better off to stick to the chicken and veggies, says Caroline Apovian, MD, director of nutrition and weight management at Boston Medical Center. “There are three parts of a grain: bran, germ, and endosperm. Refined grains remove the bran and germ, while whole grains preserve all three parts. Removing the bran and germ also removes the dietary fiber, B vitamins, and iron from grains. Refined grains include white bread, white rice, and most pastas.” Check out these easy ways to get more fiber in your diet without even trying.
Bologna
Raised below the Mason-Dixon line? Then you likely had a fried bologna sandwich with some mayo at some point in your childhood. Though a few sandwiches way back probably don’t pose a major threat, now that you’re an adult, bologna shouldn’t show up on your rolls. Registered dietitian Kaleigh McMordie, RDN, has a great take: “Meat paste. Who knows what it’s made of? No, thank you. One slice can provide 17 grams of fat, with 7 of them are saturated, and more than 800 mg of sodium, and many have added sugar, starches, and nitrates,” she says.
Energy drinks
You may have quickly chugged a Red Bull (or two) to get a night started at one time or another. Nutritionist and dietician Keith Ayoob says these popular grab-by drinks are quite, well, terrible for you. “These have just lots of caffeine and stimulants. That’s not energy—it’s speed. For real energy you need sleep, and there’s no substitute for that. You may also need a good breakfast, too,” he explains. Try these other homemade, healthier sports drinks.
Pre-packaged sushi
As pretty as they look in the refrigerated section of your grocery store, Dr. Ayoob says pre-packaged sushi is a questionable lunch or dinner selection. Not only did he personally have a bad experience with it once, but there are many factors you don’t know about that spicy tuna or California roll. Like, how long it’s been sitting there. Or how fresh the fish it. Or, if it’s even real fish to begin with. If you’re craving a roll, the best thing to do is seek a restaurant with a strong health grade rating.
Table salt
Though a staple of nearly every household, Lynn Anderson, a nutritionist, yoga instructor and health advocate says table salt isn’t the best spice selection for your diet. “Originally produced from mined salt, it starts out as a real food then quickly becomes something else. Manufacturers strip it of all its naturally-occurring minerals and then use a number of additives to dry it and heat it to temperatures of about 1,200 degrees. The salt is then stabilized with dextrose, turning it purple and then bleached white,” she explains. If you can’t kick your craving for a salty taste, Anderson says to reach for Celtic or Himalayan salt instead. How much sodium is in your food? Take our quiz and find out.
Agave
If you love a great margarita but hate the morning-after hangover that a pitcher with pals brings you—consider cutting out one ingredient that likely makes your head ache: agave. “This sweetener actually spikes the level of fructose in the blood stream,” says Anderson. “High fructose oils and sweetener increase inflammation which leads to a number of diseases.” That’s why this food myth could actually be making you gain weight.
Soy protein
Found in many products—including some of your favorites, unbeknownst to you—soy protein can be a dangerous ingredient to consume in quantity, especially for women who are sensitive to hormones. “Contrary to what we are led to believe, unfermented soy protein is not that healthy,” warns Anderson. “In the United States, soy is modified to withstand the application of glyphosate, a weed killer ingredient. Basically we are then eating weed killer with our soy! Long-term use of soy dietary supplements like soy protein is unsafe because it has been linked to disease ranging from hay fever to kidney failure.”
Non-organic strawberries
Standing in the produce section of your market, trying to figure out why that extra $3.00 is needed for an ‘organic’ piece of fruit? Let health coach Michelle Gindi convince you to shell out the extra bucks: “Non-organic strawberries topped this year’s list for the most pesticide laden produce, and the dinosaur-sized strawberries that we see in grocery stores are nothing close to what nature intended.” Known as the “dirty dozen,” these are the foods you should always buy organic.
Table syrup with pancakes
It’d be tough to get through list without pancakes—because c’mon, they’re pancakes! But instead of just going for the cheapest option at the store, Gindi says that doing your research for natural, well-made maple syrup is a smarter decision. “Though the bottle makes it look identical to maple syrup, this is actual full of artificial ingredients like caramel coloring, and is made from high fructose corn syrup instead of any natural sap,” she explains. Avoid these foods that are never worth the calories.
Canned soup
Thanks to slow cookers—or that giant stockpot on your stovetop—making soup is as easy as it gets, even for ameatur chefs. And that’s a good thing—considering how bad canned soups are for you. “Most canned soups are notorious for containing excessive amounts of sodium. Too much sodium can put you at risk for health conditions such as hypertension and cardiovascular disease, explains nutritionist Tracy Lesht MS, RD.
Flavoured coffee creamers
If you can’t drink your coffee black, you’re better off adding coconut oil, unsweetened almond milk, honey—or just about anything but a coffee creamer with artificial flavourings. Lesht says, “Most coffee creamers are packed with sugar and artificial flavours offering little nutritional value for plenty of calories!” Next, check out the foods that can make you age faster.
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