Sodium phenyl ethylamido hyaluronate (10% substitution) is a modified form of hyaluronic acid, where a portion of the hyaluronate’s hydroxyl groups are substituted with phenyl ethylamido groups. This modification enhances the compound’s stability, bioactivity, and potential for use in various biomedical and cosmetic applications. The 10% substitution allows for improved interaction with skin receptors, promoting better penetration and efficacy in hydrating and anti-aging formulations. It is commonly used in skincare products to improve moisture retention, reduce fine lines, and support skin elasticity while maintaining the natural benefits of hyaluronic acid.