Your natural testos levels are determined genetically (assuming environmental norms). HCG/Nolvadex/Clomid six week cycles have un-suppressed temporarily low testos levels and brought the subject back to his genetic norm. Supplement/herbal companies can make any claim they want without backing it up with full research. Knowing the human body and the way it works, you need to use meds/supps that will artificially boost levels without hurting the other body systems AND you need to be able to maintain those levels safely as well. Otherwise, what is the point?