i always wondered this myself, truth is I think theres so much still unknown about it as i hear from guys all the time telling me it worked well but ten guys will give me ten different storys of how it worked, some lose fat by the droves, some gain crazy muscle, some get sleepy some do not, some pump to the point of pain, some feel hungry, some curbs apetite,lol, maybe its all person to person but i know for sure as u said that i have gotten sick from my wife and waited and waited for it to kick my ass and before i knew it the sickness was gone without realy wiping me out like normal