There are 3 phases to the P90X nutrition plan designed to change along with the workout demands. Phase 1 is called the Fat Shredder phase and focuses on a high-protein diet to strengthen muscle while shedding fat rapidly. Phase 2 is the Energy Booster phase which incorporates a balanced mix of carbohydrates and protein to supply additional energy. Phase 3 is the Endurance Maximizer phase emphasizing complex carbohydrates, lean proteins, and lower fat to fuel peak performance.