Types & Formulations of Bioidentical Estrogens Biest, containing 80% estriol with 20% estradiol by weight, is one of the most popular bioidentical estrogen compounds in the USA. Although estradiol ...

The enzyme HSD17B1 is part of the mechanism that regulates estrogen action, by converting non-active estrone into active estradiol within endometrial cells. When this pathway is blocked ...