Hydroxypropyl Starch Phosphate

A modified starch derived from corn or potatoes, used to thicken and stabilize skincare formulas. It is inert, non-irritating, and has been used in cosmetics for decades without recorded safety concerns.

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.