Estrogens are powerful steroid hormones, chemicals which affect the form and function of the body and its organs.

There are three basic human estrogens: estradiol, estrone, and estrial. Estradiol is the most active form and estrial is the least active. In women, large amounts of estrogen are produced by the ovaries, and in men a small amount is present due to chemical conversion of testosterone

Estradiol tablet (Etrace, Estrofem). Take sublingually (under the tongue) in the morning and in the evening. Taking the tablets sublingually (letting them dissolve under the tongue) will largely give the same advantages as patches, gels or injectable.