Using an AI on cycle is to control estrogen.
But not wipe it all out.
You will need some of that estrogen to build muscle.
If you use an AI during cycle, then finish the cycle with it or estrogen rebound can happen.
You don't need an AI in pct.
As D7M has pointed out.
PCT is hell for some due t the crash, which I call the "flux".
I do not experience it, but most do.
Hope this helps.
Best
T





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