So a good friend of mine from elementary school started cycling about a year ago. He was about 40lbs lighter than me and he's now about 15lbs heavier than me and huge anyway so I originally joined this website because we started talking about me possibly cycling and I've done lots of research in the past about it but I've always been worried about the sources I get it from etc. Anyway he sent me a pic of the stuff he uses and it had centrino labs on it. He says the vials cost about 80$ a piece and ive looked them up and ive seen a lot of mixed reviews. What's your all's opinion?? If I'm out of turn in anyway I apologize. I've always told myself there is no such thing as stupid questions.