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Black hair is the darkest and most common of all human hair colors globally, due to large populations with this trait. This hair type contains a much more dense quantity of eumelanin pigmentation in comparison to other hair colors, such as brown, blonde and red. [1]
Recent assertions that the term "black" has never been used in the Irish language to describe people have been brought into question, which does indeed use the term dubh to describe white people with swarthy features, [25] different from the use of gorm (literally "blue") to describe those with melanated skin. [26]
The most studied black hair gene is MC1R which causes the body to produce a protein called melanocortin. [3] This protein causes hair follicles to produce a type of melanin pigmentation called eumelanin. [3] Black hair has the highest concentration of this pigmentation with brown, blonde and red hair following behind. [3]
Woolly hair is a difficult to brush hair, usually present since birth and typically most severe in childhood. [1] It has extreme curls and kinks, occurs in black people and is distinct from afro-textured hair. [3] The hairs come together to form tight locks, unlike in afro-textured hair, where the hairs remain individual. [1]
Many treatments have been explored, including immunomodulatory agents such as imiquimod. [4] Tofacitinib citrate may also have benefits. In June 2014, a 25-year-old man with almost no hair on his body was reported to have grown a full head of hair, as well as eyebrows, eyelashes, and facial, armpit, and other hair, following eight months of treatment. [5]
Both the eyes and legs are still of the normal colour. Leucism (/ ˈ l uː s ɪ z əm,-k ɪ z-/) [2] [3] [4] is a wide variety of conditions that result in partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. [4] It is occasionally spelled leukism.
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Blue hair does not naturally occur in human hair pigmentation, [1] although the hair of some animals (such as dog coats) is described as blue. Some people (typically of East Asian descent) are born with black hair that is so dark that it appears to have a metallic blue luster. In Japan, the beauty ideal for a woman is to have glossy "blue-black ...