Hydroxypropyl Starch Phosphate is a modified starch derived from natural sources (such as corn or potato) used in cosmetic formulations primarily as a thickening, emulsion-stabilizing, and texture-enhancing agent. It is generally considered safe and well tolerated in topical products.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Rare | Mild irritation possible, typically in sensitive or compromised skin. |
Allergic contact dermatitis | Very rare | Sensitization is uncommon for this modified starch ingredient. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.