Sodium Stearoyl Hyaluronate

Sodium stearoyl hyaluronate is a derivative of hyaluronic acid, a naturally occurring humectant found in the skin. It is created by chemically bonding hyaluronic acid with stearic acid (a fatty acid), which makes the molecule more stable and easier to incorporate into formulations compared to standard hyaluronic acid.In skincare and haircare products, it functions as both a humectant and an emollient, drawing moisture into the skin or hair whilst also forming a conditioning film on the surface. This dual action makes it useful in formulations designed to hydrate and soften.

Sodium stearoyl hyaluronate is a humectant, meaning it attracts and binds water molecules from the environment and deeper layers of skin, drawing them towards the surface. The stearoyl component adds emollient properties, allowing the ingredient to also coat the skin or hair surface, reducing water loss and improving feel and appearance.Because the hyaluronic acid is chemically modified, it tends to remain stable across a wider pH range and is less prone to degradation than unmodified hyaluronic acid, making it a practical choice for formulators.

Sodium stearoyl hyaluronate is typically used in moisturisers, serums and conditioners at concentrations that vary by formulation type. For optimal hydration benefit, apply to damp skin so the humectant can draw moisture in, then follow with an occlusive layer if your skin is very dry. It works well alongside other hydrating and nourishing ingredients and is generally compatible with most skincare routines.

Sodium stearoyl hyaluronate is generally well-tolerated and is considered safe for use in cosmetics. It is unlikely to cause irritation in most skin types, though those with known sensitivities to stearic acid or hyaluronic acid should patch test first.