The most studied topical phytoestrogens include genistein and daidzein from soy, resveratrol from red grape, equol from fermented soy, red clover extract (formononetin, biochanin A), and Pueraria mirifica. Your cosmetic chemist will assess stability, pH compatibility, and concentration levels. Ask manufacturers on the AJ Cosmo Labs app whether they have existing validated base formulas containing these actives.
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