Estrogen
Female sex hormone. Main HRT component for menopause symptoms.
Estradiol is the form prescribed in HRT. Transdermal (patch, gel, spray) bypasses the liver — lower clot risk than oral. Doses individualized to symptom relief. Vaginal estrogen (cream, tablet, ring) for genitourinary symptoms is very low-dose, very safe — usable even by some breast cancer survivors with oncology approval.