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1维生素D可以在阳光中紫外线的照射下在人体的皮肤内合成。维生素D可以促进小肠对钙吸收的转运;促进肾小管对钙、磷的重吸收;对骨细胞呈现多种作用;通过维生素D内分泌系统调节血钙平衡;参与机体多种功能的调节。总之维生素D与人体内钙的调节关系密切。2机体不会合成过量的维生素D:人体内存在自我调节机制,只会合成机体需要的量。3合成等量的维生素D,深色皮肤的人晒太阳的时间要比浅色皮肤的人长20~30倍。这就是为什么前列
1 Vitamin D can be synthesized in the skin of the human body under ultraviolet light in the sun. Vitamin D can promote the intestinal absorption of calcium transport; promote tubular reabsorption of calcium and phosphorus; osteoblasts have a variety of roles; through the vitamin D endocrine system to regulate blood calcium balance; involved in the regulation of a variety of functions of the body. In short, vitamin D and calcium regulation in the human body are closely related. 2 The body does not synthesize excess vitamin D: There is a self-regulating mechanism in the human body that only synthesizes the amount needed by the body. 3, the same amount of synthetic vitamin D, dark skin people sunburn longer than the light-colored skin, 20 to 30 times longer. This is why the forefront