ANSWERS: 2
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A decline in the quantities of melanin, the chemical which causes hair to be coloured.
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A faulty diet and mental worries are the two primary causes of premature graying of hair. Another most common reason is heredity. It can also be the result of a medical condition, if you are deficient in B12 or suffer from a thyroid imbalance it can also cause your hair to go gray. Check out http://usefulinfo-grayhair.blogspot.com/ for more info on gray hair.
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