Im 19. 6'2 and 210lbs. Ive been working out for a while and want to get the extra shreddness,mass and vascularity before the summer season. Ive looked at prohormones but since im so young im scared to play with my test and estrogen levels the way pro hormones do because i dont want to have any chance on messing with my endrocrin system. Since Mass FX is a natural hormone booster will it have any potential effects on my endocrin system? Also, should Retain 2 be taken after the Mass FX cycle(if i do it) or during?