A growing number of diets are recommending lowering carbohydrate intake, since the modern diet has so many more than what is necessary to fuel the body. Things like bread, pasta, sugar, soda, sweets and other grain or sugar-based foods are very high in carbohydrates, and are consumed more frequently and in greater amounts now than they ever were before.
The Atkins diet and the Keto diet
both rely on kicking the dieter’s body into a state of ketosis to begin the process of rapid fat-loss, since the body must use fat for energy during ketosis.
Dieters on other low-carbohydrate diets such as the Paleo diet (also called the primal or caveman diet) may also dip into and out of ketosis depending on their daily dietary choices, though inducing ketosis is not the primary goal of these diets.