Topical Application of Bifidobacterium-Fermented Soy Milk Extract Containing Genistein and Daidzein Improves Rheological and Physiological Properties of Skin

This study concluded that topical soy may improve skin tone, texture, and reduce hyperpigmentation while also inhibiting UVB-induced erythema and affecting hair texture.

This study found that a six-month treatment with isoflavone-rich soy extract significantly increased epidermal thickness, elastic and collagen fibers, and blood vessels in the skin of postmenopausal women.

This study observed that both in vitro and in vivo research demonstrated rice bran extract can significantly enhance collagen and elastin synthesis, reduce water loss, and improve skin quality and elasticity, highlighting its potential as a sustainable cosmetic ingredient.

This review found that both oral and topical soy-based products showed positive effects on various skin-related outcomes, including aging signs and skin barrier function, but topical applications were more likely to improve skin barrier status compared to oral supplementation.

In this study, a 6-month randomized controlled trial with postmenopausal women reported that supplementing with soy protein isolate with isoflavones led to significant improvements in skin hydration and reduced wrinkles and facial pigment intensity, but did not affect sebum production.