Watching what - calories, fats, or carbs?

With seemingly endless amount of diets in the world, it all boils down to only three principal types of them: limiting calories, fats, or carbohydrates. Which one is best for you? Generally, limiting calories is a very beneficial approach, health benefits-wise. It also requires self-discipline, so the best results are achieved with programs offering planning, support, and psychological services, online or offline. Limiting fats works well for physically very active people, not obese, and spending high amounts energy including calories from food carbohydrates. For obese people and those with insulin resistance, the best way of eating is limiting their carbohydrate total intake and/or the kind of carbs in their foods (complex versus simple, fast absorbing versus slowly absorbing).