WHY don't people have blue or green hair? ⠀ People have no green, blue or pink hair (unless of course you dye it that way), because we do not have a pigment in our bodies to color our hair in unusual shades. ⠀ Sometimes, the pigment melanin is not produced at all! In this case, his skin is almost white and his hair looks bleached. They are called albinos. ⠀ For this same reason, a person turns gray: gradually the body reduces the production of melanin, which gives the hair its color.
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