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Medication · Bioidentical Estrogen

Estradiol

Also known as: 17β-Estradiol · E2 · Bioidentical Estrogen · Estradiol Patch / Gel / Pill

Estradiol is bioidentical estrogen used in perimenopausal and postmenopausal hormone optimization. Transdermal delivery (patch or gel) is generally preferred over oral routes for cardiovascular safety; provider-reviewed candidacy is required.

Medically reviewed
Dr. Laura Purdy · MD, MBA
Clinical Director, oMeds
Last reviewed
Mechanism of action

Binds estrogen receptors α and β across tissues to restore physiologic estradiol signaling — thermoregulation, bone density, vascular tone, cognitive support, and genitourinary integrity.

Overview

What you need to know

Estradiol is the most metabolically active human estrogen. In hormone optimization it is delivered transdermally (patch, gel) or orally; transdermal routes avoid first-pass hepatic effects and the associated elevation in clotting factors. Estradiol therapy in women with an intact uterus is always paired with progesterone for endometrial protection. Candidacy review weighs personal history of estrogen-sensitive cancers, clotting history, cardiovascular context, and symptom severity. The standardized biomarker panel anchors initiation and recalibration.

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