
PHA: The Acid with Better Skin Benefits
Her WorldPolyhydroxy acids are the new superstars of over-the-counter chemical exfoliants. They’re milder than their alpha-hydroxy acid cousins, gentle enough for sensitive skin, and nourish and protect in ways other acids do not. Engracia Ang investigates them. ...

PHA: The Acid with Better Skin Benefits
Her WorldPolyhydroxy acids are the new superstars of over-the-counter chemical exfoliants. They’re milder than their alpha-hydroxy acid cousins, gentle enough for sensitive skin, and nourish and protect in ways other acids do not. Engracia Ang investigates them. ...