If you love peanut butter but don’t love all the fat and calories, we have some great news for you. At just 22 calories per tablespoon, PB2 is now on the approved list of “in the box” flavorings for Phase 1 or Phase 2. (The recommended serving size is one tablespoon per meal replacement.) HMR dieters who have tried it say that the added variety and amazing shake combinations that are possible with PB2 has actually helped them stay on the diet longer!