Naked picture of light skinned guy

They vary from very dark to brown in colour and develop a random pattern on the skin of the individual. Some populations who had diets rich in vitamin D were less affected by the evolutionary selection for light skin. Gradually developed tan in the spring prevents sunburns in the summer. You can watch it here. In Fitzpatrick's Dermatology in General Medicine. Effects of vitamin D on bone and natural selection of skin color:

The overexposure to sunlight also can lead to basal cell carcinomawhich is a common form of skin cancer.

See, that’s what the app is perfect for.

These regions were uninhabited by humans until about 12 years ago. SNP report for rs Annual Review of Genetics. Retrieved 10 December Vitamin D promotes the production of cathelicidinwhich helps to defend humans' bodies against fungal, bacterial, and viral infectionsincluding flu. Scientists believe that populations living in Europe became lighter-skinned over time because pale skin absorbs more sunlight, which is required to produce enough vitamin D. Some populations who had diets rich in vitamin D were less affected by the evolutionary selection for light skin.