let me tell ya, i was skeptical, i have tried a bunch of supplements over the years, and this stuff is AMAZING. iracing sportbikes in the 100+ degree utah weather really takes alot out of ya...and this puts it right back in. ask them for a sameple if you dont believe me! i give this to all my friends, and they are now hooked. and as a plus, it is the best hangover cure! you guys rock!