Distarch Phosphate

Distarch phosphate is a chemically modified starch derived from corn or potato. It is created by treating natural starch with phosphoric acid, which alters its structure and improves its functional properties in formulations.In skincare products, distarch phosphate primarily functions as an absorbent and anticaking agent. It helps powders and loose formulations remain dry, free-flowing, and stable by absorbing excess moisture. It also acts as a binding agent, helping to hold ingredients together in solid formats such as pressed powders or compacts.

Distarch phosphate works through its hygroscopic nature, meaning it readily absorbs and holds moisture. When incorporated into powder formulations, it absorbs ambient humidity and any oils present on the skin surface, keeping the product dry and preventing clumping or caking.The modified starch structure also provides minor binding properties, helping to hold powder particles together without requiring high concentrations of binders, which can sometimes feel heavy or occlude the skin.

Distarch phosphate appears in powder and compact formulations rather than serums or creams. If using powder products containing this ingredient, apply with a light hand to avoid over-application, which can appear chalky. It is typically not a concern when used as formulated in commercial skincare products.

Distarch phosphate is generally recognised as safe in cosmetics. It is non-irritating and suitable for most skin types, including sensitive skin, though inhaling powder formulations should be avoided.