When coming out of a longer fast, it is recommended that you gradually add food back into the diet day-by-day. Livestrong suggests that on day one after a water fast, a blend of water and sugar-free juice high that's in vitamins can be consumed in the morning, and broth soups can be added the second part of the day. On day two, continue with liquids and add in some yogurts and dairy in the evening. On day three, eat fresh produce, soup, and dairy, then add in meats and eggs in the evening. On the last day, eat whatever you want, though you'll probably want to avoid junk food and the like, for obvious reasons.
There are some definite don'ts when beginning to eat again after a water fast. This is especially important if you are coming out of a long period of fasting (five or more days). There can be some serious health consequences for incorrect refeeding. It is recommended that before and after partaking in a long fast you check in with a doctor, as one of the most serious problems that can occur is an illness called refeeding syndrome, which can cause severe and dangerous effects to your heart, kidneys, nervous system and more (via Medical News Today).
