Table 1. Test Gels for the Described Studies

To assess the anti-wrinkle efficacy of HA ester butyrate from extended use, the authors used several noninvasive instruments to measure skin moisture, elasticity, sebum and roughness effects after the topical application of two gels employing the material at different concentrations (see Table 1, A and B) and two control gels containing HA and sodium salt (C), and HA and urea (D), respectively.