I havent used the drink, but i know thier 7 day capsule formula worked like a charm. I had been smoking everyday for years including a lot of oil and bubblehash in the days before program. So u cant say the mistake is going to gnc. In fact compare ingrediants, that should help. I saved $60 by getting the gnc 7 day formula rather than going to the local head shop for a 7 day capsule. LOTS OF WATER