Hi, I fasted for 3 days and drank only water to give my digestive system a rest in an attempt to heal my GERD symptoms. I drank plenty of water and had plenty of energy, and probably did more activity than I should have in the yard during this time. The entire time I was urinating clearly, but on day 3 I urinated a dark yellow color, and then back to clear again immediately after and its been clear since. Also, I began eating again that night by introducing fruits and veggies, clear chicken broth, etc. Introducing more food every day. I feel fine, no fever, nausea, or anything associated with kidney disease. I ve had this color urine when taking vitamins, or when dehydrated, but why would this happen from not eating? Thanks Nick