Aromasin has the ability to increase free Testosterone and IGF levels in the body. Because of this, aromasin is also very useful during PCT regimes when one is trying to restore natural Testosterone production levels in order to avoid a post cycle "crash". Since one of the main goals of PCT is getting estro under control, the very last thing you want is a big estro spike right at the end. Aromasin prevents this from occurring, keeping estrogen under control, preventing rebound and getting you on the right track to a full and efficient recovery...