I did try it, it worked great BUT the fiber you have to take, made my band swell so much I could barely take it fluids, stopped the fiber part was doing better, started taking the vitmain part for day 11 and above, all the pills you have to take made it swell so bad, caused a lot of pain, I eneded having to see a doc while I was out of state and pay to have another doc take it all out and because I can eat so much I gained all and more back. My warning is all the fiber and the pills are pretty big for someone with a band, especially further into the challenge.