Comments on: Water Fasting Problems- Very Sick after Day 5 Juice fasting, water fasting, dry fasting, free support. Thu, 30 Mar 2017 20:21:26 +0000 hourly 1 By: Ron Thu, 17 Mar 2011 14:20:47 +0000 Hi Zuzana, Sorry about the very late reply. Water fasting is very taxing on the body. I would stick to juice fasting for a while. Once you are a juice fasting pro, do short water fasts before attempting a long one. The early period can be from many things. Water fasting may be one of them. If your unusual cycle continues or worsens please see an MD. Ron