Nutrition Myths That Have Stuck Around Far Too Long

The idea that fat in food becomes fat on your body is an oversimplification that gained traction during the low-fat diet era of the 1980s and 1990s. Research since then has consistently shown that healthy unsaturated fats — found in foods like olive oil, nuts, and avocados — are associated with positive health outcomes, not weight gain. All macronutrients (fat, carbohydrate, and protein) contribute calories, and excess calories from any source can contribute to weight gain. Fat is not uniquely to blame.

Lumping all carbohydrates together — from refined white bread to lentils and oats — ignores enormous differences in nutritional value. Whole food sources of carbohydrate tend to be high in fiber, vitamins, and minerals, and are associated with better metabolic health. Highly processed, low-fiber carbohydrate foods tell a different story. The research does not support blanket carbohydrate avoidance for the general population; rather, it supports prioritizing quality. Check out what nutrients Americans commonly undereat — several are found in carbohydrate-rich whole foods.

The marketing language around detox products is compelling, but the scientific basis is thin. Your body's detoxification systems — primarily the liver and kidneys — operate continuously and efficiently under normal circumstances. There is no credible clinical evidence that juice cleanses, herbal supplements marketed as detoxes, or restrictive cleansing protocols meaningfully enhance these processes in healthy individuals. Staying well-hydrated and eating a varied diet supports your organs; expensive cleanses do not add measurable benefit beyond that.

The claim that spreading food into five or six small meals "keeps your metabolism fired up" became popular in fitness circles, but controlled research has not consistently supported it. The thermic effect of food — the energy your body uses to digest and process meals — is largely proportional to the total amount eaten, not how it's divided. Some individuals may find frequent smaller meals helpful for managing hunger or energy levels, but this is a personal preference issue, not a metabolic necessity. Eating patterns that work with your lifestyle and support adequate nutrition are what matter most.

Eggs were once widely restricted because of their dietary cholesterol content. However, decades of follow-up research have refined this picture considerably. For most people, dietary cholesterol has a smaller effect on blood cholesterol levels than saturated and trans fats do. Major nutrition and cardiology organizations have generally moved away from strict egg limits for healthy individuals, though people with certain conditions — such as diabetes or familial hypercholesterolemia — may have different considerations. If you have a specific heart health concern, a conversation with your doctor or a registered dietitian is the right next step.

Honey, maple syrup, agave nectar, and similar sweeteners are often marketed as healthier alternatives. They do contain trace amounts of micronutrients that refined sugar lacks, but the quantities are too small to be nutritionally significant when used in normal serving sizes. From a blood sugar and calorie standpoint, these alternatives behave similarly to sucrose for most people. This doesn't mean sweeteners are all identical in every respect, but choosing honey over sugar is not a meaningful health upgrade on its own.