Phytic Acid Improves the Skin Bar…le-3-Propionic Acid.

Phytic acid—a compound found in high-fiber foods—improved skin barrier function in mice with atopic dermatitis when taken orally or applied topically. It worked by reshaping the skin's microbiota to produce more of a compound called indole-3-propionic acid, which strengthened the skin's natural protective barrier. This is early-stage research in mice, not humans.