Estrogen is the female sex hormone and for male athletes elevated estrogen levels is a no no! estrogen can be responsible for the development of gynoplastia, excessive water retention and can provoke your body into holding onto bodyfat reserves. None of which sounds to pleasing to most men aspiring to achieve a lean hard and muscle dense physique!
Esto suppress by pharma labs is the strongest anti-estrogenic compound around! Unlike other anti-estrogens which attempt to slow down the production of estrogen or simply prevent excessive testosterone levels convert to estorgen (via the hormone aromatase) esto suppress makes estrogen nearly useless in the body!
By binding onto estrogen receptor sites, esto suppress literally blocks the receptors estrogen would have bonded onto. This ultimately means that all though the levels of estrogen are unaffected it can't do anything in your body as hormones work in a similar way to enzymes with the 'key and lock' method of transferring messages between cells.
This is a great addition to a PH cycle where the PH in question is highly androgenic and can cause aromatisation into estrogen. It also doubles up as a fundamental part of PCT supplementation by restoring hormonal balance in the body and prevents you from losing the gains you acquired during on cycle.