Progesterone
Micronized Progesterone
Bioidentical micronized progesterone used alongside estrogen in HRT. Essential for endometrial protection and provides additional benefits for sleep, mood, and bone health.
How Progesterone Works
Micronized progesterone is bioidentical to the progesterone produced by the corpus luteum. It binds to progesterone receptors (PR-A and PR-B) throughout the body, with its primary function being to oppose the proliferative effect of estrogen on the endometrium, making it essential for uterine cancer prevention in women on estrogen therapy. Orally, progesterone is metabolized into allopregnanolone, a potent GABA-A receptor modulator that produces calming, anxiolytic, and sleep-promoting effects. Progesterone also supports myelination in the nervous system, has neuroprotective properties, and influences bone formation through osteoblast stimulation.
📊 Evidence by Outcome
Essential alongside estrogen to prevent endometrial hyperplasia.
25 studies • Consistency: High • Effect: Critical
GABA-A modulation provides natural sedative effect. Widely reported sleep improvement.
10 studies • Consistency: High • Effect: Moderate
Key Research
Peer-Reviewed Evidence • 3 Citations
Micronized progesterone: A new therapeutic option for managing menopause symptoms
Prior JC•Drugs•2019•PMID: 31679147
Key Finding: Micronized progesterone effectively manages vasomotor symptoms and improves sleep quality without the adverse effects of synthetic progestins.
View on PubMedNatural progesterone, but not medroxyprogesterone acetate, enhances the beneficial effect of estrogen on vascular reactivity
Rosano GM et al.•J Am Coll Cardiol•2000•PMID: 10736456
Key Finding: Natural progesterone preserves estrogen's cardiovascular benefits while synthetic progestins negate them, favoring bioidentical formulations.
View on PubMedProgesterone for neuroprotection and brain recovery: Translational research and clinical trials
Stein DG•Prog Neurobiol•2008•PMID: 18602444
Key Finding: Progesterone shows potent neuroprotective effects in traumatic brain injury and stroke models, with promising phase II clinical trial results.
View on PubMedCitations sourced from PubMed, Cochrane Library, and peer-reviewed journals. Study findings are summarized for accessibility. Always consult the original publication for full methodology and results.
Side Effects & Safety
Interactions & Contraindications
Drug Interactions
- •CYP3A4 inhibitors (ketoconazole, erythromycin) — can increase progesterone levels
- •CYP3A4 inducers (rifampin, carbamazepine) — can decrease progesterone levels
- •CNS depressants and sedatives — additive sedation with oral progesterone (its metabolite allopregnanolone is a GABA-A agonist)
- •Anticoagulants — monitor; progesterone has mild anti-estrogenic coagulation effects
Supplement Interactions
- •Magnesium glycinate may enhance the sleep-promoting effects of progesterone
- •Vitamin B6 supports progesterone production and metabolism
- •Chasteberry (Vitex) may support natural progesterone levels but is redundant during supplementation
- •Zinc supports hormone metabolism
Food & Timing
- •Take oral micronized progesterone at bedtime with food (improves absorption and leverages sedative effect for sleep)
- •Avoid grapefruit (CYP3A4 inhibitor — may increase levels)
- •No major food restrictions
- •Some formulations (Prometrium) use peanut oil — relevant for peanut allergy
Who Should Avoid
- •Known or suspected breast cancer (controversial — some evidence suggests progesterone is less risky than synthetic progestins)
- •Active liver disease or liver tumors
- •Undiagnosed vaginal bleeding
- •Known hypersensitivity to progesterone or peanuts (if using peanut oil-based formulations)
- •Active thrombophlebitis or thromboembolic disorders
- •Pregnancy (when used for non-obstetric indications)
📋 Protocol Snapshot
Protocols are for informational purposes only. Always consult a qualified healthcare provider before starting any treatment protocol.
Cost Guide
AED 100-400/month
Estimated UAE pricing. Costs vary by provider, dosage, and treatment plan.
Frequently Asked Questions
Yes, micronized progesterone (Utrogestan is the most common brand) is widely available in the UAE through gynecologists, endocrinologists, and pharmacies. It comes in oral capsules (100mg, 200mg) and can also be used as a vaginal suppository. Compounded progesterone creams are available through some clinics.
Sleep improvements from oral progesterone are often noticed within the first few nights due to allopregnanolone production. Cycle regulation takes 1-3 months. Mood benefits typically develop over 2-4 weeks. Endometrial protection is ongoing with consistent use.
Oral micronized progesterone provides both systemic benefits (sleep, mood, neuroprotection) and endometrial protection. Vaginal administration provides more targeted endometrial protection with higher local levels but less systemic effect (less sedation). Many practitioners prefer oral for its sleep benefits, taken at bedtime.
Yes, this is one of its most valued benefits. Oral micronized progesterone is metabolized to allopregnanolone, which acts on GABA-A receptors similarly to benzodiazepines but without the addiction risk. Many women report significantly improved sleep onset and quality. This is why it is always taken at bedtime.
Evidence from the E3N and ESTHER studies suggests micronized progesterone carries lower breast cancer and blood clot risk compared to synthetic progestins like medroxyprogesterone acetate (MPA). This is a key reason bioidentical hormone practitioners prefer micronized progesterone over synthetic alternatives.
Where to Get It (UAE)
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Medical Disclaimer: The information on this page is for educational purposes only and is not intended as medical advice. Kamura Scores reflect a combination of research evidence, safety, accessibility, and value — they are not clinical recommendations. Research citations are provided for reference; always consult the original publications for complete study details. Consult a qualified healthcare provider before starting, stopping, or modifying any treatment. Individual results may vary.