What it is
Sodium levulinate is the sodium salt of levulinic acid, a short-chain keto acid that can be derived from plant carbohydrates. In formulations it functions as a skin-conditioning agent and is frequently paired with sodium anisate or other carboxylic-acid salts to support the overall preservation system without relying on traditional preservatives. It is water-soluble and used at low levels.
Safety & warnings
Sodium levulinate is generally well tolerated at the low concentrations used in cosmetics. It is not classed among the regulated fragrance allergens and is not an oil, so comedogenicity is not a typical concern. As with any acid-salt blend used for preservation support, sensitive or reactive skin may rarely experience mild irritation.
Origin & sourcing
Typically produced from levulinic acid, which can be obtained from the acid processing of plant-derived sugars and cellulose; the finished ingredient may be marketed as nature-derived.
Questions everyone asks
What does sodium levulinate do in a sunscreen?
It conditions the skin and often helps support the preservation system, allowing formulators to keep the product stable with milder preservative blends.
Is sodium levulinate natural?
It is the salt of levulinic acid, which can be sourced from plant sugars, so it is often described as nature-derived, though the finished material is processed.