Photoeffect of Skin Colour

In this article we investigate photo effect of vitamin D and foliate and the effect to the variation of skin colour.We use a UV/VIS spectrometer to record the absorption spectrum of foliate.Relating this to the synthesis of vitamin D and formation of melanin in the skin under UV radiation,we explain how all these factors contribute to skin colour change.Foliate degrades quickly when riboflavin is represented under UVB and blue light.The result indicates that human skin pigmentation may evolve as a protection of the UV sensitive vitamin folate in the blood and the balancing needs of folate protection and vitamin D production.