I wouldn't go to high or to my limit but I would do around 60mcgs daily for 2 wks on and then have 2 wks off then repeat. I was shocked how strong it made me in PCT and I mean strong! it always did that to me for some strange reason. I definitely held more gains and it was of great benefit to me maintaining my gains. Great addition to any PCT protocol IMHO, I did suffer palpitation though with clen which eventually made me stop using it.