6. Building a whole diet around a single food
Many fad diets tend to focus heavily on just one or two “miraculous” foods. The avocado diet, anyone? Perhaps, the quinoa diet? The truth is, none of these diets last, and for good reason. First of all, no one in their right mind would ever be able to make a single food 90% of his diet for weeks (let alone months). Secondly, no food by itself can render the body the vast amount of proteins, carbs, fats, vitamins, fiber, and other nutrients it needs to remain fit. That’s why healthy, time-tested diets (like the Mediterranean diet), always include a wide variety of foods in their program.