<P> A typical explanation found in the scientific literature for the evolution of light hair is related to the evolution of light skin , and in turn the requirement for vitamin D synthesis and northern Europe 's seasonal less solar radiation . Lighter skin is due to a low concentration in pigmentation , thus allowing more sunlight to trigger the production of vitamin D. In this way , high frequencies of light hair in northern latitudes are a result of the light skin adaptation to lower levels of solar radiation , which reduces the prevalence of rickets caused by vitamin D deficiency . The darker pigmentation at higher latitudes in certain ethnic groups such as the Inuit is explained by a greater proportion of seafood in their diet and by the climate which they live in , because in the polar climate there is more ice or snow on the ground , and this reflects the solar radiation onto the skin , making this environment lack the conditions for the person to have blond , brown or red hair , light skin and blue , grey or green eyes . </P>
where does blonde hair green eyes come from
a low concentration in pigmentation