After years of not using any supplement other than protein powder, I decided to see what the buzz about the new creatine product was about as I had heard from numerous friends about strength and size gains from it. I decided to give in and try it for a month, how harmful could a creatine product be? Well, it cost me $650 in medical bills to find out. After three weeks of using it I had a routine physical and full blood test which discovered that my liver function was 10X normal meaning that my liver was working overtime cleaning some toxic crap out of my body. After a liver ultrasound and several other expensive tests later, the only possible cause remaining was the creatine product. Although I didn't go to the expense of having the product itself tested for toxic impurities, I'm convinced they are there. Anyway, shame on my for not listening to my own advice! BTW, because of liability concerns I am not going to name the product so don't ask - suffice it to say that it is one of the very popular products.