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The Worst Nutrition Advice That Dietitians Want You To Stop Following ASAP

It seems like nutrition advice is constantly evolving. First fat was unhealthy, then it was good again. Egg yolks were deemed bad for your heart, but now we can eat them again. Some people eat a strict Paleo diet, while others forgo animal products and eat entirely plant-based. Grains, gluten, and sugar, which used to be staples in the American diet, have been demonized in recent years.

But while nutrition is nuanced and there’s no one diet that works for everyone, there are some major nutrition myths that dietitians want to bust. As research evolves, some once-held nutrition beliefs are horribly outdated. We spoke to several registered dietitians who set the record straight once and for all.

“Eating Fat Makes You Fat”

Fat was once demonized as the culprit behind America’s collective expanding waistline, which ushered in the ’80s and ’90s low-fat craze. Turns out, that may have done more harm than good.

“Nearly two in three Americans believe that dietary fat is their enemy. But here’s the truth: certain fats can actually help you lose weight,” Joy Bauer, RDN, CDN, told POPSUGAR. “In fact, you should go out of your way to eat moderate amounts of the good stuff, like monounsaturated and polyunsaturated fats found in nuts, seeds, avocado, fatty fish, and vegetable oils.” She says these fats can help you slim down and reduce your risk for heart disease. Load up on omega-3 fatty acids like the ones found in salmon, walnuts, flax seeds, chia seeds, and nut-based oils.

“Juicing Will Help You Lose Weight”

Plenty of juice bars offer multiday juice cleanses, which promise to “detox” your body and help you jump-start your weight-loss goals. The problem? You end up ingesting more sugar than other valuable nutrients.

“Juicing is all the rage right now, but by squeezing out all of the juice from a fruit, you are missing out on one of the best parts: fiber! By extracting the juice from fruit, you’re leaving behind the pulp, which is where the fiber is,” Brooke Zigler, RDN, LD, told POPSUGAR. “Fiber slows digestion, which gives you a steady blood glucose level and sustained energy. It also helps to give you more regular bowel movements, thus reducing constipation. Fiber is a an important part of our diets and is also a great tool for weight loss.”

Adding a few vegetable-based juices into your diet each week is a good way to get vitamins and phytonutrients; replacing entire meals or just drinking juice for days at a time is not a good idea. Better yet? Just eat the fruits and vegetables you would juice whole for a more filling, fiber-rich option.