Cardiologist Robert C. Atkins created the Atkins Diet in 1972, according to the Mayo Clinic. It is a diet that calls for an increase in the consumption of protein and fats and a decrease in carbohydrates.
WebMD explains that the Atkins Diet consists of four phases. The first part, which is the induction phase, lasts for two weeks and allows the dieter to eat only 20 grams of carbohydrates a day. High-protein fare and good fats are the only acceptable foods during this period. With each subsequent phase, increased levels of carbohydrates are gradually added into the high-protein diet at a rate that still allows for continual weight loss. Phase four is the lifetime maintenance phase in which the weight loss goal has been reached and the dieter has found the amount of carbohydrates that allow for weight maintenance.