Black Lion Research : Letrone Estrogen Blocker

Oestrogen blockers are a standard part of PCT after a prohormone cycle, but they can also be used for leaning out and promoting a lean, hard, 'dry' figure. Black Lion Research's Letrone is a powerful aromatose inhibitor (AI) and an excellent oestrogen blocker.

Letrone is based on Atractylodes macrocephala, a herb based compound which has been shown to reduce aromatase by as much as 94%. Black Lion Research claim that this compound has greater bioavilability, and thus greater effectiveness, than other rival compounds. 

What makes Letrone particularly interesting in our view though is its promised anabolic effects. Aside from its clear potential as an AI, Atractylodes macrocephala has been shown in one study to increase endogenous hormones. Simply speaking, this means it increases levels of your body's natural muscle building hormones, boosting testosterone, HGH, and IGF-1 - all hugely important compounds for bodybuilders.

All of this gives it significant anabolic potential, meaning that it offers benefits above and beyond a standard oestrogen blocker. Whilst the studies used by Black Lion Research were all conducted on animals rather than humans, the results look promising in terms of their potential to deliver real world results for bodybuilders.

All told this looks like an excellent product that will work well either as standalone or as part of a PCT stack.