Nutrition Myths That Refuse to Die

The idea that carbohydrates cause fat gain took hold partly through the popularity of low-carb diets that did produce short-term weight loss for many people. However, that loss is largely explained by reduced calorie intake and initial water loss — not a metabolic property of carbs themselves. Whole-food carbohydrate sources such as legumes, oats, and vegetables are associated in research with healthy body weight and reduced chronic disease risk. The type and quantity of carbohydrate consumed, alongside total dietary context, matters far more than the nutrient category alone.

"Detox" is a medically meaningful term in specific clinical contexts — such as alcohol or drug withdrawal — but it has been borrowed loosely by the wellness industry. The human body's detoxification system is sophisticated and self-regulating. Research has not demonstrated that juice cleanses, herbal detox teas, or similar products measurably improve liver function in healthy individuals. Supporting liver health through general lifestyle factors — limiting alcohol, maintaining a varied diet, and avoiding unnecessary medications or supplements — is consistent with what evidence supports.

The low-fat movement of the 1980s and 1990s led many people to replace fat with refined carbohydrates and added sugars — an exchange that research has since questioned. Fat is necessary for absorbing fat-soluble vitamins (A, D, E, and K), supporting cell membrane structure, and producing hormones. Unsaturated fats found in foods like nuts, seeds, avocados, and fish are consistently associated with cardiovascular benefit in large observational studies. Trans fats, largely removed from the US food supply, were the clearest dietary-fat concern — not fat as a category. See a full breakdown of fat types for more detail.

Research on intermittent fasting and meal timing is active and evolving, but current evidence does not support a single meal-timing prescription for all adults. Some people manage their appetite and energy well without an early meal; others find skipping breakfast leads to compensatory overeating later. The idea that breakfast "kick-starts" metabolism is an oversimplification — the thermic effect of food is real, but modest. What matters more consistently is the overall quality and quantity of food eaten throughout the day rather than the specific hour at which eating begins.

Supplements serve a genuine purpose in specific circumstances — vitamin D in low-sunlight climates, folate in pregnancy, B12 for those avoiding animal products. But supplements are not an equivalent substitute for a varied diet. Whole foods contain fibre, phytonutrients, and cofactors that interact in ways not fully captured by isolating individual vitamins or minerals into pill form. Several large randomised controlled trials testing antioxidant supplements, for instance, did not reproduce the benefits observed in populations that ate antioxidant-rich diets. Supplements are best viewed as targeted tools, not dietary foundations.