Are bioidentical hormones FDA-approved?

Some are. "Bioidentical" refers to molecular structure, and FDA-approved body-identical products already exist — including estradiol patches, gels, and sprays and micronized progesterone capsules. What is usually NOT FDA-approved is custom-compounded bioidentical hormone therapy (pellets, creams, troches), which is made by compounding pharmacies without FDA review.

Are compounded bioidentical hormones safer or more natural?

There is no good evidence that they are. A 2020 National Academies (NASEM) report found insufficient evidence to support the safety or effectiveness of compounded bioidentical hormone therapy and recommended restricting its use. Compounded products use the same molecules as FDA-approved hormones but without testing for dose consistency or standardized safety labeling.

What is the difference between body-identical and compounded bioidentical hormones?

Body-identical FDA-approved products (such as estradiol patches and micronized progesterone) contain the same molecules your body makes and are manufactured to tested, consistent doses with FDA-reviewed labeling. Compounded bioidentical hormone therapy uses those same molecules but is custom-mixed by a pharmacy, is not FDA-approved, and is not tested for potency or consistency.

Is saliva hormone testing accurate for menopause dosing?

No. Salivary hormone levels fluctuate widely and are not a validated way to guide menopause hormone therapy. Professional guidelines base dosing on symptoms and clinical judgment rather than saliva panels. Being told you need a compounded prescription based on a saliva test is a reason for caution.

Should I choose bioidentical hormones over conventional HRT?

If you want body-identical hormones, FDA-approved estradiol and micronized progesterone are body-identical and carry the assurance of regulated manufacturing and evidence. Most experts recommend these approved products over compounded alternatives, reserving compounding for people who cannot use an approved option. The right choice for you is a discussion for a licensed clinician.

Hormone therapy · Myth vs. fact

Bioidentical hormones: myth vs. fact

ClearHormones Editorial Team · Updated July 2026

"Bioidentical" is one of the most confusing words in menopause care. Strictly, it just means a hormone with the same molecular structure as the one your body makes — and by that definition many FDA-approved products, such as estradiol patches and micronized progesterone, are already bioidentical. In marketing, though, "bioidentical hormone therapy" usually means custom-compounded pellets, creams, and troches sold as safer or more natural. That version is not FDA-approved, and a major 2020 National Academies report found it lacks the evidence to support those claims.

What "bioidentical" actually means

A bioidentical hormone is one whose molecular structure is identical to a hormone your body produces — for menopause that mainly means estradiol (the main estrogen) and progesterone. The word says nothing about where the hormone came from or who made it. Estradiol synthesized in a large pharmaceutical plant and estradiol compounded in a local pharmacy are the same molecule; "bioidentical" alone does not make one safer or more natural than the other.

This matters because the term is frequently used in marketing to imply that custom-compounded hormones are fundamentally different from — and superior to — conventional prescriptions. They are not different at the molecular level. The real distinction is regulatory: whether the product has been reviewed and approved by the FDA for purity, potency, and safety.

FDA-approved body-identical products already exist

Many people are surprised to learn that body-identical hormones are already available as FDA-approved, standardized products. Estradiol is approved as skin patches, gels, sprays, and vaginal preparations, and micronized progesterone is approved as an oral capsule (Prometrium and generics). These are the same molecules a compounding pharmacy would use — but they are manufactured to consistent doses, tested for quality, and carry FDA-reviewed labeling and safety information.

For most women who want "natural" or "body-identical" hormones, an FDA-approved estradiol patch plus micronized progesterone delivers exactly that, with the added assurance of regulated manufacturing. The Menopause Society and other professional bodies generally recommend these approved products over compounded alternatives when hormone therapy is appropriate.

Read the monographs for the two most common body-identical options: the estradiol patch and micronized progesterone.

Compounded cBHT: what the 2020 NASEM report found

In 2020, the National Academies of Sciences, Engineering, and Medicine (NASEM) published a comprehensive report on compounded bioidentical hormone therapy (cBHT) — the custom pellets, creams, gels, and troches at the center of "bioidentical" marketing. The report concluded that there is insufficient evidence to support the safety and effectiveness of cBHT for its common uses, and it recommended restricting the use of compounded hormones to patients who cannot use an FDA-approved product (for example, because of an allergy to an ingredient or a need for a dosage form that is not commercially available).

The concern is not the molecule but the lack of oversight. Compounded products are not tested by the FDA for potency or consistency, so the actual dose can vary from what is prescribed, and they do not carry the standardized safety labeling — including the boxed warnings — that approved hormone products do. The American College of Obstetricians and Gynecologists (ACOG) reached a similar position in its 2023 clinical consensus, advising against compounded hormone therapy when an approved option exists.

Salivary hormone testing is not validated

Compounded-hormone programs frequently pair prescriptions with saliva hormone testing, promising to "customize" your dose to your levels. But salivary hormone measurements fluctuate widely and do not reliably reflect the tissue levels that matter, and professional guidelines do not consider saliva testing a validated tool for guiding menopause hormone therapy. Dosing decisions in mainstream care are based on symptoms and clinical judgment, not saliva panels.

If you are told you need a compounded prescription because a saliva (or blood "hormone balancing") test shows a deficiency, that is a reason for caution. Standardized, symptom-guided therapy with approved products is the evidence-based approach for the vast majority of people.

Honest comparison: approved vs. compounded

The table below summarizes the practical differences. The short version: FDA-approved body-identical hormones give you the "bioidentical" molecule with regulated quality and evidence behind it, while compounded cBHT trades that oversight for customization that most people do not actually need.

FDA-approved body-identical vs. compounded cBHT

	FDA-approved body-identical	Compounded cBHT
Molecule	Body-identical estradiol / progesterone	Body-identical estradiol / progesterone (same molecule)
FDA review	Reviewed and approved for purity, potency, safety	Not FDA-approved; not reviewed for potency or consistency
Dose consistency	Standardized, tested doses	Can vary from batch to batch
Safety labeling	Standardized labeling, including boxed warnings	No standardized FDA safety labeling
Evidence	Studied in trials; guideline-supported	2020 NASEM report found insufficient evidence
Best use	First choice for most people	Reserved for those who cannot use an approved product

A note on choosing therapy

Hormone therapy — bioidentical or otherwise — is a prescription decision that rests with a licensed clinician who knows your history. This page is informational and does not recommend a product or dose. To see how estradiol, progesterone, and delivery routes compare, read our hormone therapy options visual guide, or start with what perimenopause is.

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Frequently asked questions

Are bioidentical hormones FDA-approved?: Some are. "Bioidentical" refers to molecular structure, and FDA-approved body-identical products already exist — including estradiol patches, gels, and sprays and micronized progesterone capsules. What is usually NOT FDA-approved is custom-compounded bioidentical hormone therapy (pellets, creams, troches), which is made by compounding pharmacies without FDA review.
Are compounded bioidentical hormones safer or more natural?: There is no good evidence that they are. A 2020 National Academies (NASEM) report found insufficient evidence to support the safety or effectiveness of compounded bioidentical hormone therapy and recommended restricting its use. Compounded products use the same molecules as FDA-approved hormones but without testing for dose consistency or standardized safety labeling.
What is the difference between body-identical and compounded bioidentical hormones?: Body-identical FDA-approved products (such as estradiol patches and micronized progesterone) contain the same molecules your body makes and are manufactured to tested, consistent doses with FDA-reviewed labeling. Compounded bioidentical hormone therapy uses those same molecules but is custom-mixed by a pharmacy, is not FDA-approved, and is not tested for potency or consistency.
Is saliva hormone testing accurate for menopause dosing?: No. Salivary hormone levels fluctuate widely and are not a validated way to guide menopause hormone therapy. Professional guidelines base dosing on symptoms and clinical judgment rather than saliva panels. Being told you need a compounded prescription based on a saliva test is a reason for caution.
Should I choose bioidentical hormones over conventional HRT?: If you want body-identical hormones, FDA-approved estradiol and micronized progesterone are body-identical and carry the assurance of regulated manufacturing and evidence. Most experts recommend these approved products over compounded alternatives, reserving compounding for people who cannot use an approved option. The right choice for you is a discussion for a licensed clinician.

Primary medical sources

ClearHormones publishes editorial health information for education only — not medical advice.