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Bioidentical means the hormone molecule is chemically identical — atom for atom — to the hormone your body produces naturally. This is different from synthetic hormones like progestins (e.g., medroxyprogesterone acetate), which have a different molecular structure. The idea is that a molecule identical to your body's own should be recognized and metabolized the same way.

Some bioidentical hormones are FDA-approved — for example, FDA-approved bioidentical estradiol patches and micronized progesterone (Prometrium) are widely prescribed. However, compounded BHRT (custom-mixed formulations from a compounding pharmacy) is not individually FDA-approved, because each batch is custom-made for a specific patient. This distinction matters when evaluating safety and quality standards.

BHRT has a reasonable safety profile when prescribed appropriately and monitored regularly. Risks depend on the specific hormones used, your dosage, your health history, and how long you use it. The biggest areas of ongoing research involve breast cancer risk with estrogen, cardiovascular effects, and clotting. Working with a provider who monitors your hormone levels through regular lab testing significantly reduces these risks. Our research section covers the current evidence in depth.

Start with your symptoms — fatigue, brain fog, hot flashes, sleep disruption, weight gain, low libido, mood changes, and vaginal dryness are all common signs of hormone imbalance. Next, get your labs tested. A good BHRT provider will run a comprehensive hormone panel (not just a standard TSH or estrogen check) and interpret results in context with your symptoms. Our Hormone Symptom Checker can help you organize your symptoms before your first appointment.

BHRT can be delivered as pellets (tiny rice-sized pellets implanted under the skin every 3–6 months), creams or gels (applied daily to skin), patches (worn on skin and changed twice weekly), injections (administered weekly or bi-weekly), or oral capsules. Each has pros and cons around convenience, cost, hormone stability, and how your body absorbs it. Our Delivery Methods guide covers the tradeoffs in detail.

It depends on the type of BHRT. FDA-approved bioidentical hormone prescriptions (like estradiol patches or micronized progesterone) are often covered by insurance the same way other prescriptions are. Compounded BHRT is generally not covered and must be paid out of pocket — costs typically range from $150 to $400+ per month depending on the method and location. Our Cost Guide breaks this down by state and delivery method.