What it is
Hydrolyzed Starch is produced by partially breaking down starch, typically of plant origin, into shorter-chain sugars and dextrins that are water-soluble and skin-compatible. In formulations it can act as a humectant, help condition the skin, and contribute to texture and body. In sunscreens it is a functional supporting ingredient that aids sensory feel rather than providing UV protection.
Safety & warnings
Hydrolyzed starch is widely used and considered well tolerated, with a very low likelihood of irritation or sensitization. It is a water-soluble carbohydrate and is not associated with comedogenicity.
Origin & sourcing
Typically plant-derived, made by hydrolyzing starch from sources such as corn, potato, or other plants into smaller saccharide fragments.
Questions everyone asks
What does hydrolyzed starch do in a sunscreen?
It can act as a humectant and texture aid, helping to condition the skin and improve the feel of the formula. It is not a UV filter.
Where does hydrolyzed starch come from?
It is generally made from plant starches such as corn or potato that are broken down into smaller, water-soluble sugar fragments.