well good things dont come for free

if u take steroid u will gain muscle and body size but bear in mind it will cost you something else...

the steroid actually makes a fake impulse which subtitutes the brain impulse and send it to the endocrine that produce hormone and stimulate more hormones to increase your muscle but in the process that is supposed to be sent to your testicle will be lessen and thus in long time term u will suffer from erectile dysfunction early