“Bioidentical” is a description, not a brand.

If you've been researching hormone therapy on Maui, you've met the word everywhere — on clinic websites, in ads, from friends. Bioidentical. It arrives sounding like a category of care you either get or don't, and often like something you can only obtain from a particular kind of clinic.

Here's the part that tends to reframe the whole conversation: bioidentical describes a molecule, not a business model. And some of the best-studied bioidentical hormones in the world are sitting at your regular pharmacy right now.

What the word actually means

A bioidentical hormone is one whose chemical structure is identical to the hormone your own ovaries produced. Estradiol is estradiol. Progesterone is progesterone. That's the entire claim the word makes.

What it does not tell you is where the hormone came from, whether it was tested for potency, whether the dose in the container matches the dose on the label, or whether anyone has studied that particular preparation. Those are separate questions — and they're the ones that actually affect your care.

The part most clinics leave out: many bioidenticals are FDA-approved

There's a widespread impression that bioidentical hormones are something only a compounding pharmacy can make. That isn't so. FDA-approved bioidentical options include:

Estradiol — as a transdermal patch, a topical gel, a spray, a vaginal ring, a vaginal tablet, and an oral tablet.
Micronized progesterone — as an oral capsule, structurally identical to your own progesterone.

These are the preparations with the largest evidence base behind them. They're manufactured under federal standards for potency, purity and sterility. Each batch is consistent with the last. They carry standardized labeling — which means the risks are disclosed in writing rather than described differently at each clinic. And they're often covered by insurance, which compounded products typically are not.

For most women who need systemic hormone therapy, an FDA-approved bioidentical preparation is the right starting point. Not because it's conservative, but because it's the best-characterized medicine available.

When compounding genuinely makes sense

Compounding is a legitimate and sometimes necessary pharmacy practice. It earns its place when:

— You have a documented allergy or intolerance to an ingredient in the commercial product.
— The dose or combination you need isn't commercially manufactured.
— You need a route that no approved product provides.
— The medication is testosterone for a woman — where no FDA-approved female product exists in the United States, so appropriate prescribing necessarily involves a compounded preparation dosed to the female physiologic range.

What isn't supported by the evidence is compounding as the default setting — every patient, every visit, regardless of whether a tested product would have worked. That's a business model wearing the language of personalization.

Why we don't use pellets

Pellets are implanted under the skin and release hormone continuously for months. The appeal is obvious: nothing to apply, nothing to remember. But that convenience carries a trade-off that deserves to be stated plainly before anyone consents to it.

This isn't a fringe position. The Menopause Society's 2022 Hormone Therapy Position Statement discourages compounded hormone therapy generally and identifies pellets specifically as a concern. The American College of Obstetricians and Gynecologists reached the same conclusion in its 2023 clinical consensus on compounded bioidentical menopausal hormone therapy. The National Academies of Sciences, Engineering, and Medicine reviewed the evidence in 2020 and found it insufficient to support routine use.

So when a clinic's menu offers exactly one delivery method, that tells you something about the menu. It's a fair question to ask out loud: “If this dose doesn't suit me, how do we change it?” Listen closely to the answer.

The routes we actually use

Every option below shares one property: the dose can be changed.

Transdermal estradiol — patch, gel or spray. Absorbed through the skin, bypassing first-pass liver metabolism. Generally the preferred systemic route, and the one with the most reassuring data on clot risk.

Oral micronized progesterone. For anyone with a uterus taking systemic estrogen, progesterone protects the uterine lining. Taken at bedtime, it helps some women sleep.

Vaginal estrogen — cream, tablet or ring. For dryness, painful sex, and urinary symptoms. Minimal systemic absorption, which makes it appropriate for many women who can't or don't want to take systemic hormones. More on genitourinary symptoms →

Compounded preparations, where indicated. Including testosterone, dosed and monitored to keep levels within the normal female range. More on testosterone for women →

How this works here

We start with what's actually going on — your symptoms, your history, your risk factors, where you are in the transition — and only then choose a preparation. Baseline labs when they're informative, a recheck at roughly eight to ten weeks, and adjustment based on how you feel rather than solely on a number.

Dr. G is a Menopause Society Certified Practitioner, which is the recognized specialty credential in menopause medicine, and is board certified in Obstetrics & Gynecology and in Obesity Medicine. Care is available in our Wailea office, and by telehealth for patients located anywhere in Hawaiʻi — Oʻahu, Hawaiʻi Island, Kauaʻi, Molokaʻi and Lānaʻi included — as well as Illinois.

Common questions

Does bioidentical mean compounded? No. Bioidentical describes the hormone's structure; compounded describes where it was mixed. Several bioidentical hormones are FDA-approved and stocked at ordinary pharmacies.

Are bioidentical hormones FDA-approved? Many are — estradiol as a patch, gel, spray, vaginal ring, vaginal tablet or oral tablet, and micronized progesterone as a capsule. These are tested for potency and consistency and are often covered by insurance.

Are hormone pellets recommended? Not for routine use. The Menopause Society and ACOG both advise against them, principally because pellets often produce levels above the normal range and cannot be adjusted or removed once placed.

Do you offer pellets? No. We use routes whose dose can be changed or stopped.

Is compounding ever appropriate? Yes — for documented allergies, for doses or combinations not commercially made, and for testosterone in women, where no FDA-approved female product exists in the United States.