Hair hue hints at health clues: melanin, risk, and aging

Hair color is determined by melanin; two types, eumelanin and pheomelanin, shape shades from brown/black to blond/red. Research links hair color to health factors such as melanoma risk (redheads may face higher risk) and possibly pain sensitivity, while stress and genetics can influence graying. Overall, your natural hair color can reflect certain health risks and aging patterns.