Why doesn’t the FDA approve all hormone forms

DISCLOSURE: Voshell's Pharmacy is a licensed compounding pharmacy that prepares and sells compounded medications by prescription. As a provider of competing products, our perspective may be influenced by our professional and commercial interests.

According to FDA.gov, the FDA does not approve every hormone form because only products that demonstrate safety, effectiveness, and consistent manufacturing quality through the full review process may receive approval. Many hormone products on the market have not completed this process.

Why the FDA approves some hormones and not others

According to FDA.gov, the FDA requires any hormone therapy to show clear evidence that it works, that its risks are understood, and that each dose is manufactured to the same standard every time. Some hormone forms have this evidence. Others do not, either because studies have not been conducted, or because the manufacturer has not applied for approval. Compounded medications are not reviewed by FDA for safety or effectiveness before dispensing and are prepared by a licensed pharmacist only in response to a valid prescription for an individual patient. This page primarily discusses commercially available hormone therapy products.

Key reasons for non‑approval

• Lack of large, well‑designed studies: According to FDA.gov, approval requires strong research demonstrating benefit and safety. Many hormone forms, especially those prepared individually by pharmacies, have never been studied in this way.
• No fixed, standardized dose: Commercially available FDA‑approved hormones must be reproducible batch to batch. Products prepared individually by pharmacies may vary in ingredients, potency, and absorption, which means they do not meet the reproducibility standard required for FDA approval.
• Testing for safety and purity may be inconsistent: According to FDA.gov, commercially available FDA‑approved hormones must meet strict requirements for potency, sterility, and stability. Products not subject to these manufacturing standards have not been evaluated under the same criteria.
• Companies may choose not to pursue approval: The approval process is resource-intensive. Some manufacturers decide not to invest in the required research even if the product might ultimately meet the standard.
• Claims not supported by evidence: According to FDA.gov, some hormone forms are marketed as more natural or safer without data to support those claims. The FDA does not approve a product based on theory alone.

What this means for women considering HRT

According to FDA.gov, FDA approval does not mean a hormone is risk‑free. It means the hormone has been studied, its risks are known, its benefits are established, and every dose is manufactured to a defined standard. When a hormone is not FDA‑approved, it generally means there is less reliable information about how well it works or what its risks may be. A qualified prescriber can help evaluate which options are appropriate for an individual patient's circumstances.