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European nations established only from Medieval times - whites are very new to Europe
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[QUOTE]Originally posted by meninarmer: [QB] [QUOTE]Originally posted by rasol: [qb] [QUOTE]Note the different levels of UV penetration which explains why blacks absorb and convert UV->Vitamin D and why long term, irreparable cellular damage is highly likely in whites.[/QUOTE]^ Where does -the study- you are citing say this? How come you need to append your drivel to a study which says no such thing? Melanin has no role in vitamin D synthesis - which is why nothing is mentioned with regards to it in the study you cited. Melanin merely blocks UV. In order to synthesize vitamin D UV must contact the skin cells. This is why skin with less melanin blocking sunlight can synthesize more vitamin D. However this is at the cost of exposing the skin to more radiation. Hence there is a tradeoff. This is why skin color varies in individuals and groups. This is the scientific concensus. The study you presented confirms this, and in no way refutes it. The only 'refutation' comes by way of your scientifically illiterate drivel which has nothing to do with what was cited. [/qb][/QUOTE]Melanin does not "block" sunlight. Like all black body objects, it ABSORBS rather then REFLECTS radiation. It is WHITE skin that REFLECTS (lower level energy) and is damaged by higher level radiation which passes through the Stratum corneuim, Granular, Spiney, and Basal protective layers going on to damage vital cells. [/QB][/QUOTE]
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