as long as you have excessive aromatizing compounds in your system that convert to estrogen then take your aromasin
but I do not agree that you should take it during PCT. assuming you ran your AI correctly while on, you should NOT use an AI during pct ever. healthy estrogen levels are important during pct to maintain libido, mood, and muscle. suppressing estrogen after cycle is an old school method that you do not have to do today with modern ancillaries based on the idea that low estrogen meant high testosterone. I can assure you that you NEVER want low estrogen unless you want to be skinny, have joint pain, and have a dick that doesn't function