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Are some patches of skin better UV absorbers/vitamin D initiators?

Asked on June 18, 2013
Created June 18, 2013 at 10:33 PM

Much like different patches of skin throughout the body have different densities of nerve endings, I am wondering if similar disparities exist with regard to sun exposure and vitamin D production. For the sake of simplicity let's assume the entire body is homogeneous with regard to skin darkness (no farmer's tans). Is all skin, then, created equal in the eyes of UV radiation?

That is, for example, will ten minutes of chest exposure have a higher yield than ten minutes of back exposure? The face? Somewhere else? Of those who have had your vitamin D levels tested have you noticed a more pronounced difference from exposing different body parts to the sun?

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