I've doing research into PCT and herb/nature based PCT and was looking up the active ingredients in HCGenerate. I'm looking for some studies (hard science) to show that is beneficial and will actually stimulat the leydig cells. So far All ive found is a study that indicates it maybe harmful to the Kidney (mostly for someone with already compromised renal status) :http://www.unilorin.edu.ng/publications/akanji/Effect of chronic.pdf