I have been on Metermine 15mg for 5 days. I am drinking approx 3.5 L of water daily and exercise every morning doing Gillian Michaels.. I am currently eating 3 small meals daily but my goal is to get to 5. I thought drinking and excercising this much my body would be flushing out any toxins however I find (without giving to much info) I am only going to the bathroom maybe 4 times a day. Is anyone else experiencing this and is it normal? Someone suggested I may have water retention as I have noticed slowly my weight is going up on the scales, I am not taking much notice as my weigh in day is Monday.