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Hair pigmentation refers to the coloration or shade of the hair, which is determined by the presence of pigments in the hair fibers. These pigments, mainly melanins, are produced in the hair follicles and give the hair color its characteristic tint. There are two main types of melanin that influence hair color: Eumelanin and pheomelanin.
Eumelanin is responsible for darker hair colors such as black and brown, while pheomelanin causes red and yellow tones. A person’s specific hair color is determined by the amount and ratio of these two types of melanin, which are genetically determined.
Hair pigmentation can change over the course of a lifetime due to various factors. For example, the production of melanin decreases with age, leading to gray or white hair. Environmental factors such as UV light, chemical treatments such as hair coloring and certain diseases can also influence hair pigmentation.
Genetic factors play a major role in determining hair color and its changes, but external influences can also have a significant effect. This complex interaction of genetic and environmental factors ultimately determines a person’s individual hair color and its changes over the course of their life.
