Man you should throw in the ERASE... though not a lot has been PROVEN with this compound (a 7-keto family member) I´ve seen on anabolicminds or bb.com -cant remeber some good blood work for ERASE, which showed indeed a reduction in estradiol levels... I´ve also read somewhere that in order to properlly function.. the 7-KETO needs to be metabolized by a certain enzime - can´t remember the name.. turns out this enzyme is also responsible to convert cortisone into its most powerful form, cortisol... SO thus, the enzime, which has a higher affinity for the Androsta-3,5-diene-7,17-dione then for cortisone is always ''busy'' metabolizing the 7-keto.. lowering your cortisol levels. That will play an enormous role in your PCT. Your body perceives hormonal imbalances as STRESS, and will counter jacking cortisone levels!