The stuff at your supplement store barely works, costs a fortune and sometimes does have illegal steroids in it. I used it for a couple of years and about every six months had to change products because the Feds had shut down the manufacture. It didn't do any harm but ran about $75/month and really didn't do much good either. If you think you really have low test, get your doctor to test you and prescribe but warning, after an initial period on coupons, the price rises to about $300/month. I've heard about an injectable that you can get with a prescription at a compounding pharmacy called 10% test in emu compounded and it runs $45-$75/month. Never tried it, though.