It sounds like: You got lucky with longevity genes, but hair color, and tendency to grey or silver at any age does not seem to be predictable in an individual. In scrutinizing presidential photos, the enormity, stress and pressure seem to induce graying. Not sure of the science.
Answered 10/3/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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