| 摘要 |
<p>Stabilised compsns. capable of releasing an active agent (I) on contact with the skin contain at least two precursors capable of simultaneously releasing (I) by different enzymatic reactions at a rate greater than the sum of the rates of the individual reactions. Also claimed is a compsn. as above where (I) is vitamin C. (I) is pref. selected from vitamins, lipopeptides, lipoamino acids, alpha- or beta-hydroxy acids, antioxidants and hydrating agents, esp. ascorbic acid, retinol, tocopherol, quercetin, lactic acid or glycerol. (II) is a palmitate, acetate, propionate, nicotinate, sulphate ester, phosphate ester (esp. ascorbyl phosphate), glyceride or ferulate and (III) is a glycosylated deriv. (esp. glucosylated ascorbic acid)</p> |
