Let your body do its work. Nothing but water. Also after you get off the fast you will need to build your gut microbium. Antibiotics have killed all good and bad bacteria in your body. Two weeks of fasting will be good. Break your fast gently, a week later you can introduce, Kimchi, Sauerkraut, Kombucha, Kefir, and other fermented foods to replenish your gut microbium.