Bioidentical hormones vs standard HRT: what is the difference?

Bioidentical Hormones vs. Standard HRT

Standard HRT

These are FDA-approved hormone medications that may contain:

• Synthetic hormones (like medroxyprogesterone acetate)
• Animal-derived hormones (like Premarin, made from pregnant mare's urine)
• Chemically modified versions that don't exactly match human hormones

Common brands: Premarin, Provera, Prempro

Bioidentical Hormones

These have a molecular structure identical to hormones your body naturally produces (estradiol, progesterone, testosterone).

Two categories:

• FDA-approved bioidentical options - rigorously tested

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

• Compounded bioidentical hormones - custom-mixed by compounding pharmacies, not FDA-approved, variable quality

Key Considerations

• FDA-approved bioidenticals offer the best of both worlds - natural structure with proven safety testing
• Compounded versions lack standardized dosing and safety data
• Marketing around "bioidentical" can sometimes be misleading

My Recommendation

Talk to your doctor about FDA-approved bioidentical options like Prometrium or Vivelle-Dot as a starting point - they combine molecular compatibility with regulatory oversight.

Would you like more detail on any specific aspect?