I would use it(pct).Guys like Arnold and the other greats back in the day didnt use,but then again they did outrageous cycles one right after the other and trained like freaks.So when they came off they lost gains but were on gear so much it didnt seem like much was lost.P.C.T. is a must.Myself,i always use a SERM to restart my boys,cortisol blocker,i run most of the same supp's i used during cycle as well.Anti estrogen too.I dont lose any of my gains.And i have all my pre,during,after,supp's before i even start a cycle...and some supp's my doctor has me take a month sometimes two after pct(niacin)..no pct and not only will you lose gains but maybe even more...