Department of Medicine, University of California, Los Angeles, 90095, USA.
Dermatol Ther. 2010 Jan-Feb;23(1):48-60. doi: 10.1111/j.1529-8019.2009.01290.x.
Ultraviolet B radiation exposure is responsible for the majority of natural vitamin D stores in humans. The physiologic role of vitamin D in health and disease is continually expanding, and at the same time the population that is vitamin D deficient is increasing. The environmental characteristics and personal physical traits that contribute to vitamin D3 synthesis from sun exposure are discussed, and the effects of photoprotection on vitamin D status are examined. It is concluded that sunscreen, in the manner used by the general public, does not cause vitamin D insufficiency. Implementing guidelines suggesting sun exposure duration for sufficient vitamin D3 production is limited by the complex interaction of contributory factors, and no recommendation can be made that is both safe and accurate enough for general public usage.
紫外线 B 辐射暴露是人类体内大多数天然维生素 D 储存的原因。维生素 D 在健康和疾病中的生理作用不断扩大，同时维生素 D 缺乏的人群也在增加。讨论了促进维生素 D3 合成的环境特征和个人身体特征，以及光保护对维生素 D 状态的影响。结论是，防晒霜的使用方式不会导致维生素 D 不足。实施建议适当阳光暴露以产生足够的维生素 D3 的指南受到促成因素的复杂相互作用的限制，并且对于一般公众的使用，没有既安全又准确的建议。
