Wouldnt recommend GH under 30yrs and even thats pushing it.. since you would have to inj 10ius in order to offset the 6-8ius your body is already producing daily... and if you are having that many issues with injuries at 25, take some MSN, joint support, cart support... and maybe decrease your weight at the gym till your body fully recovers... I wish I could turn back time and would of went lighter at the gym because my joints are paying for it now..