Evidence supporting the use of: Daidzein
For the body system: Vagina

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Table of Contents

Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Daidzein is an isoflavone found predominantly in soybeans and other legumes. It is classified as a phytoestrogen, meaning it can bind to estrogen receptors and exert mild estrogen-like effects in the body. Scientific interest in daidzein’s effects on the vaginal body system centers primarily on its potential to alleviate symptoms of vaginal atrophy and dryness, which are common in postmenopausal women due to decreased estrogen levels. Several clinical studies have investigated the impact of soy isoflavones, including daidzein, on menopausal symptoms. Meta-analyses and randomized controlled trials suggest that isoflavone supplementation can modestly improve vaginal cytology and moisture, likely by partially compensating for the loss of endogenous estrogen. However, the magnitude of benefit is generally less than that offered by traditional hormone replacement therapy. Additionally, the quality and consistency of evidence vary, with some studies reporting statistically significant improvements and others showing minimal or no effect. Importantly, the use of daidzein and other phytoestrogens for vaginal health is not supported by all medical guidelines, and further long-term safety data are needed. In summary, while there is some scientific validation for daidzein’s use in supporting vaginal health, particularly for postmenopausal symptoms, the evidence is moderate and not universally accepted.

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Products containing Daidzein

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