28-Day FAST Start Day-by-Day Day 1: Begin with a light breakfast of fruit and yogurt. Gradually increase water intake throughout the day. Day 2: Continue with a light breakfast and add a small amount of lean protein. Introduce green vegetables into your lunch and dinner. Day 3: Add more protein to your breakfast and lunch. Include a variety of fruits and vegetables in your meals. Day 4: Focus on whole grains and lean protein for breakfast. Add healthy fats to your lunch and dinner. Day 5: Continue with a balanced breakfast and lunch. Include a small amount of dark chocolate for a treat. Day 6: Start the day with a protein-rich breakfast. Add a variety of vegetables to your lunch and dinner. Day 7: Rest and recover. Enjoy a light breakfast and lunch. Have a small dinner with plenty of vegetables. * Repeat for 28 days.