Researched by Helena DeMaria-Williams
Formula IngredientAbsorbent / Anticaking AgentDistarch Phosphate
INCI: Distarch Phosphate
Distarch phosphate is a modified starch derivative produced by esterifying food starches (such as tapioca, rice, or corn) with phosphoric acid. It appears as a fine white powder and functions primarily as an absorbent and anticaking agent in cosmetic formulations, helping to control excess oil, improve texture, and provide a matte finish. Its large molecular size prevents significant penetration through the skin, limiting systemic exposure.
Category
Absorbent / Anticaking Agent
Irritation Risk
Low
Skin Types
all skin types, oily, combination, acne-prone
What does this do in a formula?
oil absorption, mattifying effect, anticaking, texture improvement, reduces greasy or tacky feel, prevents clumping in powders
Is Distarch Phosphate safe? Key considerations
Can Distarch Phosphate cause irritation?
Low RiskClinically assessed as non-irritating and non-sensitizing at typical cosmetic concentrations. The 2022 CIR Expert Panel concluded distarch phosphate is safe in cosmetics at current use levels (up to 7.5% in leave-on products). No EU Annex II or III restrictions apply. Rare mild irritation may occur in individuals with starch hypersensitivity.
Does Distarch Phosphate increase sun sensitivity?
No RiskDistarch phosphate has no known phototoxic effects and does not increase photosensitivity. No sun protection precautions are required based on its presence in a formulation.
Is Distarch Phosphate safe during pregnancy?
SafeNo reproductive or developmental concerns are noted in available safety data. The FDA recognises distarch phosphate as Generally Recognized As Safe (GRAS) for food use. Animal toxicity studies showed no significant adverse effects. No pregnancy-specific warnings are noted by EWG or CIR.
How does Distarch Phosphate work?
Distarch phosphate is a modified starch derivative produced by esterifying food starches (such as tapioca, rice, or corn) with phosphoric acid. It appears as a fine white powder and functions primarily as an absorbent and anticaking agent in cosmetic formulations, helping to control excess oil, improve texture, and provide a matte finish. Its large molecular size prevents significant penetration through the skin, limiting systemic exposure.
Individuals with starch hypersensitivity or corn/tapioca/rice allergy (rare) should review the considerations above before use.
Which products contain Distarch Phosphate?
Shop products that contain Distarch Phosphate
