A friend and myself a while back bought deca from a chemist who made it himself. It was deca 300 and yellow in colour. I myself got extremely good results from it but my friend chickened out and didnt use his at all. 2.5 years later he still has d the 10ml vials that he didnt use. He had it stored in his garage in a cool environment. My question is would it still be good to use?