I have started them, because I have MCS and can not tolerate any suppliments or herb and got severely under weight using colon cleansing herbs and kidney flush herbs. I felt that my only choice now is water.
I don't feel they are natural but, neither is a prolaped colon, a balooned colon, impacted fecal matter, and MCS all of with I have. I believe my problems stem from constipation since I was a child, caused by lack of exercise, iced tea (caffine is dehydrating) with lots of sugar, lots of asprin (caffine like substance)for leg pain from infancy, not drinking enough water, poor diet (SAD diet), and Antibiotics .
I am so often wrong I am a bit leary of posting again.