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Bioidentical hormones vs standard HRT: what is the difference?

ClaudecomparisonCollected Sep 1, 2026, 15:42 UTC

Verbatim response from Claude

Bioidentical Hormones vs. Standard HRT

Standard HRT

These are conventional hormone replacement therapies, which may include synthetic or animal-derived hormones. Examples include:

  • Premarin (estrogen derived from pregnant mare urine)
  • Provera/medroxyprogesterone (synthetic progestin)
  • Prempro (combined estrogen/progestin)

Bioidentical Hormones

These have a molecular structure identical to hormones your body naturally produces.

FDA-approved bioidentical options include:

  • Estrace, Vivelle-Dot (bioidentical estradiol patches/pills)
  • Prometrium (bioidentical progesterone)
  • Divigel, Evamist (estradiol gels/sprays)

Compounded bioidenticals are custom-mixed by pharmacies like Belmar Pharmacy or Empower Pharmacy, though these are not FDA-regulated for safety/efficacy.

Key Differences

Standard HRTBioidentical
StructureMay differ from natural hormonesMatches natural hormones
FDA approvalYesSome yes, some no
CustomizationLimitedHigh (compounded)

Bottom Line

Many doctors recommend FDA-approved bioidentical options as a good middle ground. Work with a menopause specialist or visit menopause.org to find a certified practitioner.

Always consult your doctor before starting any hormone therapy.

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