5. Conclusions
SKIN PIGMENT
In conclusion, supplementation with a standardized, multicomponent soy protein isolate with added isoflavones may improve facial wrinkle severity, reduce skin pigment intensity, and increase skin hydration in postmenopausal women with Fitzpatrick skin types I, II, and III. Future studies assessing supplementation of a soy protein with added isoflavones with an expanded population including males, younger participants, and higher Fitzpatrick skin types are warranted. Additionally, studies utilizing isolated soy protein and isoflavones to assess its effects on skin health may strengthen these associations. Since phytoestrogens may mimic estrogenic effects in the skin, future studies might also investigate the systemic effects of soy isoflavones in postmenopausal women from a gynecological or multidisciplinary perspective. 