The science behind how the Atkins diet helps you to lose weight is simple. When you eat very few carbohydrates (which are your usual main source of energy), the body goes into what is called a 'ketogenic state' where it must rely on stored fat for energy. As a result, you burn fat quickly and begin to lose weight. This process also makes the body produce compounds called ketones, which initially give dieters a 'buzz' or euphoric feeling. Most dieters don't feel deprived on low-carbohydrates diets for the first several days because they are eating meals high in fat.
The four-phase individualized eating plan allows one to knowledgeably select which foods to eat based on ones need to achieve weight loss and weight maintenance, enjoy good health and prevent disease. Food selections will differ to varying degrees depending upon the phase and individual metabolism.