xanthophyl :
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- SENIOR POWER Goin’ gray: Chlorophyl To Xanthophyl
American poet-playwright Edward Arlington Robinson (1869-1935) wrote, “The gods are growing old; The stars are singing Golden hair to gray. Green leaf to yellow leaf,—or chlorophyll To xanthophyl, to be more scientific.” Why is gray hair the quintessential old age indicator?
June 21, 2013 - The Berkeley Daily Planet