I find it has really helped with my energy levels, muscle mass, mental clarity, recovery, it generally makes me feel years younger. Yes there are unproven potential side affects however I have no family history of the risks associated. Functional health is as important as actual longevity I live and act like I am a decade younger at least what is that worth? This year I toured solo over 10 weeks in Europe and felt great like I was on a gap year from university, I feel this would not have been the same without supplemental T.