| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a material for improving the resistivity of the skin to ultraviolet irradiation, and to provide a composition which comprises the material and can achieve the effective utilization of the material in the industry. <P>SOLUTION: The ultraviolet resistivity enhancer contains thioctic acids and/or a hydrolysis product of chitin as an active ingredient. The thioctic acids are preferably thioctic acid, a derivative of the thioctic acid, a lipid-covered product thereof or a doubly covered product obtained by further covering the lipid-covered product with a hydrophilic material, and the hydrolyzate of the chitin is preferably N-acetyl-D-glucosamine or N-acetylchitooligosaccharide. Oral compositions such as a food and drink for heightening the resistivity of the skin to the ultraviolet containing these active ingredients are also provided. <P>COPYRIGHT: (C)2009,JPO&INPIT |
