I purchased this product a few weeks ago after taking my chances despite some of the strange comments on different message boards. I was concerned about the reviews stating it caused constipation and headaches. The only time I got a headache was when I didn't drink enough water, which the product states could happen. I didn't have any constipation, but on the days that I drank significantly less water than recommended, I did notice I was a little more bloated than usual. I have been very regular, at least once per day, sometimes twice and no hard stools. I've felt refreshed and energetic, though I'm not sure if that's from the product or not. I don't have any complaints about the product as of yet, but am still taking it, so I will post otherwise should it happen. My suggestion while taking this product would be to follow the directions as noted. I did have to brew the tea a little longer than the 2-3 minutes during the 1st 5 days, and for about 7-10 minutes after that. No rushing to the bathroom for me. Too much water or too little water don't help. Try to stick to the recommended amount. Hope this review helps and good luck if you decide to try the product.