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越来越多的科研证据表明,人的暴露部位:颜面、颈、手臂及手等部位的皮肤改变与非暴露部位的皮肤老化有显著的不同。我们在日常生活中要注意尽量减少对光敏物质的接触,尤其是过敏性体质的人。防晒化妆品应重视对 UVA 的防护作用北京日用化学研究所杜小嘉、徐卫、杜雪洁随着皮肤科学的发展,UVA 区紫外线对人类的伤害被逐渐揭示出来。人类皮肤中黑素是通过对紫外线的吸收和散射对人体产生保护作用,两者均由黑素的密度和分布所决定的。肤色较深的种族对 UVB 的保护能力为白种人的30倍,其主要功能是保护基层细胞及其皮下组织,不易晒伤。黑素的另一功能是与有毒的光化学产物相互作用从而增强保护作用。
More and more scientific evidence shows that human exposure to the site: face, neck, arms and hands and other parts of the skin changes and non-exposed parts of the skin aging significantly different. We in daily life should pay attention to minimize the exposure to light-sensitive substances, especially those with allergic constitution. Sunscreen cosmetics should pay attention to the protective effect of UVA Beijing Institute of Applied Chemistry Du Xiaojia, Xu Wei, Du Xuejie With the development of dermatology, UVA UV damage to human beings is gradually revealed. Melanin in human skin protects the human body through the absorption and scattering of ultraviolet light, both of which are determined by the density and distribution of melanin. The darker race is 30x more protective of UVB than Caucasians, whose main function is to protect the cells of the basal cells and their subcutaneous tissues, making them less prone to sunburn. Another function of melanin is to interact with toxic photochemical products to enhance the protective effect.