What it is
Distarch phosphate is made by cross-linking starch with a phosphate reagent, which improves its stability compared with native starch. In skin care it is valued for absorbing excess oil and water, mattifying the skin surface, and counteracting the greasy or sticky feel of oils and UV filters. It is frequently used in primers and finishing sunscreens to deliver a smooth, velvety, blurred appearance.
Safety & warnings
Considered a gentle, low-irritation ingredient suitable for most skin types, including sensitive skin. As an inert starch powder it is not associated with sensitization.
Origin & sourcing
Derived from natural starch (commonly corn, tapioca, or potato) that is chemically cross-linked with a phosphate reagent.
Questions everyone asks
Why is distarch phosphate added to sunscreen?
It absorbs excess oil and water and mattifies the skin, helping reduce the sticky or shiny feel that sunscreen oils and filters can leave behind.
Is it natural?
It starts from natural starch such as corn or tapioca, then is chemically cross-linked with phosphate to make it more stable, so it is best described as a modified natural ingredient.