polyhydroxy acid
大部分的果酸(AHAs)會刺激皮膚，，葡萄糖酸內酯(Gluconolactone)及乳糖酸 (lactobionic acid)屬於多羥基酸(PHA)的兩種物質，他們具有果酸的效果，對皮膚較不具刺激性，它們與果酸的不同在於它們的分子結構比果酸大許多，減少了葡萄糖酸內酯及乳糖酸的皮膚穿透力，因此降低了對皮膚的刺激性，皮膚穿透力下降並不會影響這兩個新成份的功效，葡萄糖酸內酯的皮膚穿透度僅較甘醇酸少了6%
Most of the fruit acids (AHAs) can irritate the skin. Gluconolactone and lactobionic acid are two substances of polyhydroxy acid (PHA). They have the effect of fruit acid and are less effective on the skin. Irritating, they are different from fruit acids in that their molecular structure is much larger than that of fruit acids, which reduces the skin penetration of gluconolactone and lactobionic acid, thereby reducing the irritation to the skin, and the skin penetration is reduced and Will not affect the efficacy of these two new ingredients, the skin penetration of gluconolactone is only 6% less than that of glycolic acid.
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