I don't know why but I am disappointed. I used them in my first round and lost 30 pounds. I was lucky enough to get two bottles on ebay right before they cracked down ... so I have enough for my second round. I'm not 100% I'll do a third round but it's disappointing when I found something that works but now it's not available. Guess if I want to do it again, I'll have to find a different company.