YAY Skincare - Before you glow-glow - exfoliating PHA tonerGently exfoliates Our toner is formulated with gluconolactone, a naturally occurring polyhydroxy acid (PHA) with exfoliating properties. It has larger molecules than other acids, which means it penetrates the skin less deeply, making it extra gentle and safe to use on sensitive skin. Improves skin barrier The addition of naturally derived prebiotic inulin supports the skins protective microorganisms and helps reduce the growth of harmful bacteria.