Low-carb diet trends in the 2000s.

Food restriction plans that greatly minimize or eliminate specific carbohydrates. Together with fats and proteins, carbohydrates (carbs) are one of the three macronutrients, or energy-containing nutrients, of the human diet. Low-carb diets, which reduce or eliminate certain carbohydrates, can be short-lived, calorie-restrictive fads, or they can be tiered weight-loss programs that replace carbohydrate calories with another macronutrient.