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Progesterone Cream (OTC) Research & Evidence

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Evidence Level

Emerging

OTC progesterone cream has a limited but growing evidence base. The Leonetti et al. (1999) RCT of 102 women showed reduced vasomotor symptoms with transdermal progesterone cream. However, the cream format raises absorption variability concerns — serum levels rise modestly while salivary levels increase dramatically, making monitoring challenging. The Endocrine Society and NAMS generally recommend prescription-grade progesterone (oral micronized or vaginal) over OTC creams for reliable dosing. Nonetheless, many integrative practitioners use OTC creams successfully for mild perimenopausal symptoms.

Evidence by Condition

ConditionStudied DoseEvidence
Perimenopausal symptoms20mg once or twice daily, cycle days 12-26Emerging
Estrogen dominance20mg daily during luteal phaseEmerging
Postmenopausal support20mg daily, 25 days on / 5 days offPreliminary
Full Progesterone Cream (OTC) Guide

References

  1. RCTLeonetti HB, Longo S, Anasti JN (1999). Transdermal progesterone cream for vasomotor symptoms and postmenopausal bone loss. Obstetrics & Gynecology. DOI PubMed
  2. RCTWren BG, McFarland K, Edwards L, O'Shea P, Sufi S, Gross B, Eden JA (2000). Effect of sequential transdermal progesterone cream on endometrium, bleeding pattern, and plasma progesterone and salivary progesterone levels in postmenopausal women. Climacteric. DOI PubMed