Why some hormone pills are safer than others for women after menopause
Estradiol and Micronized Progesterone: A Narrative Review About Their Use as Hormone Replacement Therapy
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Oral estradiol — even the 'bio-identical' kind — doubles VTE risk, while transdermal estradiol doesn’t.
Most people assume 'bio-identical' means safer across the board — but this shows the delivery route (oral vs. skin) overrides the chemical identity.
Practical Takeaways
If you're on oral HRT with synthetic progestins, ask your doctor about switching to transdermal estradiol + micronized progesterone.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Oral estradiol — even the 'bio-identical' kind — doubles VTE risk, while transdermal estradiol doesn’t.
Most people assume 'bio-identical' means safer across the board — but this shows the delivery route (oral vs. skin) overrides the chemical identity.
Practical Takeaways
If you're on oral HRT with synthetic progestins, ask your doctor about switching to transdermal estradiol + micronized progesterone.
Publication
Journal
Journal of Clinical Medicine
Year
2025
Authors
Martina Foschi, Giulia Groccia, Maria Laura Rusce, Celeste Medaglia, Claudia Aio, Alessandra Sponzilli, Veronica Setti, C. Battipaglia, A. Genazzani
Related Content
Claims (5)
Taking estrogen through a patch or gel can help improve your good cholesterol and lower your bad cholesterol, and using a natural form of progesterone doesn’t mess with your cholesterol, but synthetic versions might lower good cholesterol or raise triglycerides.
If you use a patch or gel for estrogen instead of a pill, and pair it with a specific type of progesterone, you’re not more likely to get dangerous blood clots — but if you take estrogen as a pill with any progesterone, your risk of blood clots doubles compared to not taking any hormones at all.
If you're taking hormone therapy with estrogen, using a type of progesterone that’s identical to what your body makes (micronized progesterone) might be safer for your breasts than using lab-made versions (synthetic progestins), based on studies of women’s health.
Some women take hormones to manage menopause symptoms, and this claim says that a type of estrogen made to match the body’s own (bio-identical estradiol) is safer for blood clots than a different type made from horse urine (conjugated equine estrogens).
Taking a specific form of estrogen and natural progesterone together every day for a year is just as good at protecting the uterus lining as other hormone pills, and it rarely causes abnormal thickening—making it a safe choice for women who still have their uterus.