topicIsoflavones Skin Hydration Randomized Trial
claimIn exploratory regression analysis limited to S-equol producers, higher urinary S-equol levels were significantly associated with improved under-eye wrinkle parameters and transepidermal water loss (TEWL) at D42.
evidence level2
citationVijayakumar V (2025)
sourceS-equol status modulates skin response to soy isoflavones in postmenopausal women: results from a randomized placebo-controlled pilot trial.
topicIsoflavones Skin Hydration Randomized Trial
claimMultivariable model adjusting for age, soy intake, phototype and their interactions confirmed that older women experienced greater improvements in undereye wrinkles and barrier function in response to increased S-equol levels.
evidence level2
citationVijayakumar V (2025)
sourceS-equol status modulates skin response to soy isoflavones in postmenopausal women: results from a randomized placebo-controlled pilot trial.
topicIsoflavones Skin Hydration Randomized Trial
claimConclusion Soy isoflavone supplementation increased urinary S-equol concentrations and was associated with improvements in under-eye wrinkle appearance, skin hydration, and barrier function-particularly among older postmenopausal women identified as S-equol producers.
evidence level2
citationVijayakumar V (2025)
sourceS-equol status modulates skin response to soy isoflavones in postmenopausal women: results from a randomized placebo-controlled pilot trial.
topicIsoflavones Skin Hydration Randomized Trial
claimBackground/objectives Soy isoflavones may benefit skin health in postmenopausal women, potentially via S-equol, a gut-derived metabolite with enhanced estrogenic and antioxidant activity.
evidence level2
citationVijayakumar V (2025)
sourceS-equol status modulates skin response to soy isoflavones in postmenopausal women: results from a randomized placebo-controlled pilot trial.
topicIsoflavones Skin Hydration Randomized Trial
claimAs a result, isoflavones may promote cell proliferation [], act as antioxidants [], and exert anti-inflammatory and anti-cancer properties [,].
evidence level2
citationRizzo Julianne (2023)
sourceSoy Protein Containing Isoflavones Improves Facial Signs of Photoaging and Skin Hydration in Postmenopausal Women: Results of a Prospective Randomized Double-Blind Controlled Trial
topicIsoflavones Skin Hydration Randomized Trial
claimOne pilot study showed that the use of an isoflavone-rich soy extract for six months in postmenopausal women significantly increased epithelial thickness, elasticity, collagen fiber quantity, and angiogenesis [].
evidence level2
citationRizzo Julianne (2023)
sourceSoy Protein Containing Isoflavones Improves Facial Signs of Photoaging and Skin Hydration in Postmenopausal Women: Results of a Prospective Randomized Double-Blind Controlled Trial
topicIsoflavones Skin Hydration Randomized Trial
claimIn rats, soy isoflavones significantly increased the thickness of the skin epidermis, collagen fibers in the dermis, and the number of elastic fibers [].
evidence level2
citationRizzo Julianne (2023)
sourceSoy Protein Containing Isoflavones Improves Facial Signs of Photoaging and Skin Hydration in Postmenopausal Women: Results of a Prospective Randomized Double-Blind Controlled Trial
topicIsoflavones Skin Hydration Randomized Trial
claim1 2 3 4 5 6 7 8 9 10 11 Plant-derived isoflavones are naturally occurring nonsteroidal compounds that resemble estrogens and are commonly classified as phytoestrogens [].
evidence level2
citationRizzo Julianne (2023)
sourceSoy Protein Containing Isoflavones Improves Facial Signs of Photoaging and Skin Hydration in Postmenopausal Women: Results of a Prospective Randomized Double-Blind Controlled Trial