It's a risky endeavor-nobody knows what that stuff does to your body long term-but if you have a weak bodypart it can really bring it up in a matter of a week or two. If you do a web search you can find out how to take it. However I must warn you that you'll start feeling like a human pin cushion after about 3 weeks. There's also some bruising at the injection site which is like wearing a sign that says "I'm on Synthol, my muscles are fake". The gains are temporary(a couple months) and they are by no means high quality muscle in appearance. If you wanna see some examples of synthol abuse google a pic of greg valentino. Personally I'm not too sure I believe in the whole muscle fascia stretching theory synthol use is supposed to provide.