Higher concentrations of melanin — the color pigment in skin and hair — may be placing darker pigmented smokers at increased susceptibility to nicotine dependence and tobacco-related carcinogens than lighter skinned smokers, according to scientists.
Higher concentrations of melanin — the color pigment in skin and hair — may be placing darker pigmented smokers at increased susceptibility to nicotine dependence and tobacco-related carcinogens than lighter skinned smokers, according to scientists.