Global supply Chinese factory 50-50-0 Estradiol benzoate in supplier

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Estradiol is commonly produced with an ester side-chain as endogenous estradiol has very low oral bioavailability on its own (2-10%). First-pass metabolism by the gut and the liver quickly degrades the estradiol molecule before it gets a chance to enter systemic circulation and exert its estrogenic effects . Esterification of estradiol aims to improves absorption and bioavailability after oral administration (such as with Estradiol valerate) or to sustain release from depot intramuscular injections (such as with Estradiol Cypionate) through improved lipophilicity. Following absorption, the esters are cleaved, resulting in the release of endogenous estradiol, or 17β-estradiol. Ester pro-drugs of estradiol are therefore considered to be bioidentical forms of estrogen

Estradiol valerate by intramuscular injection is usually used at a dosage of 10 to 20 mg every 4 weeks in the treatment of menopausal symptoms and hypoestrogenism due to hypogonadism, castration, or primary ovarian failure in women.In the past, it was used at even higher doses of 10 to 40 every 1 to 4 weeks for estrogen replacement. Estradiol valerate is usually used in the treatment of advanced prostate cancer in men at a dosage of 30 mg or more every 1 to 2 weeks by intramuscular injection. In transgender women, estradiol valerate given by intramuscular injection is usually used at a dosage of 5 to 20 mg, but up to 30 to 40 mg, once every 2 weeks. Estradiol valerate has also been used at a dose of 10 to 40 mg by intramuscular injection to limit bleeding in women with hemorrhage due to dysfunctional uterine bleeding