The carbohydrate diet, often referred to as the "low-carbohydrate diet," is any program that reduces the consumption of carbohydrates and glycemic foods, according to About.com. The reduction of carbohydrates promotes weight loss by eliminating excess sugar in the diet and increasing the metabolic rate.
There are three major types of carbohydrate diets, according to About.com. Simple carbohydrate reduction involves reducing the amount of carbohydrates consumed to between 5 and 45 percent of the daily calories consumed. Personalized carbohydrate diets involve working with a nutritionist to determine the right percentage of carbohydrates each individual should consume. Ketogenic carbohydrate diets force the body into a state that allows it burns fat as fuel rather than carbohydrates, resulting in accelerated weight loss.
The most common food restrictions on a carbohydrate diet are sugar, bread and pasta, according to Wikipedia. Foods that are high in fat and protein, such as meat, eggs, poultry, fish, shellfish, nuts and cheese, are used as carbohydrates. Fruits and vegetables are allowed on most carbohydrate diets even though they contain a significant amount of carbohydrates. This is because they are a natural rather than a refined source of carbohydrates. Wikipedia also explains that various studies show that low-carbohydrate diets without caloric restriction are at least as effective as low-fat diets and those that restrict calories.