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hormone

Micronized Progesterone

Also known as: Utrogestan, Prometrium

Body-identical progesterone derived from plant sources and micronized for absorption. Used to protect the uterine lining in women taking oestrogen HRT. Can be taken orally or vaginally and is associated with better sleep and fewer side effects than synthetic progestogens.

This page contains self-reported experiences from the Narrated community — not clinical data. Outcomes are subjective. Always consult your doctor or specialist before starting, stopping, or changing any approach.

Regulatory status does not mean an approach is safe or unsafe. Laws vary by country — check your local regulations.

Community Experiences

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Research Context

Research context compiled from published sources

How does Micronized Progesterone work?

Binds to progesterone receptors in the endometrium, preventing oestrogen-driven hyperplasia. Micronization increases bioavailability. Metabolites (allopregnanolone) act on GABA receptors, contributing to its sedative and anxiolytic properties.

Research Depth

Well Studied

Extensive human research over many years, including randomized controlled trials.

Long-Term Evidence

Well Characterized

Decades of long-term safety data available from human use.

Known Interactions
Sedatives and hypnotics (additive CNS depression)CYP3A4 inducers
Reported Contraindicated Populations
Undiagnosed vaginal bleedingActive liver diseasePeanut allergy (capsules contain peanut oil)History of progesterone-sensitive cancers
Published Dose Ranges
100300 mg/dayoral · daily (cyclical or continuous)
BNF
100200 mg/dayvaginal · daily
BNF

Dose ranges from published research. Individual dosing should be determined with your healthcare provider based on your specific circumstances.

Factual research context from published sources — not a safety assessment or recommendation. Research classifications may change as new data emerges.

Related Approaches

Other approaches tracked on Narrated.

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