estrone, a derivative of estradiol and the second most dominant estrogen
estriol, a very short-acting estrogen
and the least biologically active.
The first mis
that US Food and Drug Adminis
tration (FDA)-regulated drugs are not bioidentical. This is
wrong. A long lis
t of FDA-approved hormone products contain 17-beta estradiol and, therefor
e, are bioidentical. Examples include oral esterase, estradiol transdermal patches (Climara®, Vivelle®) and the vaginal ring (Estring®).