乳酸作为酸化剂和酸味剂应用于饮料、食品、化妆品和药品。
乳酸应用于外用制剂尤其是化妆品中,对皮肤有酸化和调节作用。乳酸页用于生无可降解聚合物和微球的生产,如聚D-乳酸,应用于药物的传递系统。
乳酸也可用作食品防腐剂。在治疗上,乳酸以乳酸盐的形式用于注射剂中,以提供碳酸氢盐,用以治疗代谢酸中毒;用作杀精子剂;以阴道栓形式治疗宫颈白带;用于婴儿进食;在外用制剂中用于治疗皮肤疣[1]。
Lactic acid is used in beverages, foods, cosmetics, and pharmaceuticals as an acidifying agent and acidulant.
In topical formulations, particularly cosmetics, it is
used for its softening and conditioning effect on the skin. Lactic acid
may also be used in the production of biodegradable polymers and micro-
spheres, such as poly (D-lactic acid), used in drug delivery systems.
Lactic acid is also used as a food preservative.
Therapeutically, lactic acid is used in injections, in the form of
lactate, as a source of bicarbonate for the treatment of metabolic
acidosis; as a spermicidal agent; in pessaries for the treatment of
leukorrhea; in infant feeds; and in topical formulations for the
treatment of warts[2].
在化妆品工业中,乳酸常用来取代乙醇酸,因为它比乙醇酸的刺激性要小。它据称具有减缓皱纹、减轻阳光造成的伤害、加强皮肤结构、肤色和提高皮肤的形态等等的效果。使用乳酸作为化妆用品时要进行额外防范,因为乳酸可以提高对于阳光中紫外线的敏感度[3]。
[1] R.C.罗,P.J.舍斯基,P.J.韦勒.药用辅料手册[M].北京:化学工业出版社,2005,第366页.
[2]美国FDA批准药物非活性成分数据库http://www.drugfuture.com/excipients/
[3]维基百科,http://zh.wikipedia.org/zh-cn/%E4%B9%B3%E9%85%B8