The very existence of the essential vitamin D, or "sunshine vitamin," was not established until the present century, but its imprint upon history goes back a million years or more. According to a theory now elaborated by Brandeis University Biochemist W. Farnsworth Loomis, it is because of the human body's need to take in a certain amount of vitamin D, but not too much, that the human species has developed into three principal racial groups distinguished by skin color and loosely called black, yellow and white.
Loomis points out in the journal Science...
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