Soy Protein Containing Isoflavones Improves Facial Signs of Photoaging and Skin Hydration in Postmenopausal Women: Results of a Prospective Randomized Double-Blind Controlled Trial.

With food-based interventions, it is not known how continued supplementation may further alter the wrinkle severity, but there was an increasing trend for continued improvement in this study from week 16 to week 24, suggesting that a future study over a longer time frame may be warranted.

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