Table 3. Test emulsions with or without hyaluronic acid ester butyrate, used in the moisturizing and elasticizing efficacy tests

Tests of the emulsions containing 0.1% HA butyrate (see Table 3) showed the formulae to induce a remarkable and highly significant  increase in skin moisture values (p < 0.01), +52% and +44.4%, respectively. 34, 35 In addition, a highly significant increase (p < 0.01) in biological elasticity, R2, was noted, equal to + 15.6% and +23.1%, respectively. Comparison of the tested formulas with the placebo resulted in highly significant results throughout the tests (see Figure 8).