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Poliosis circumscripta, commonly referred to as a "white forelock", is a condition characterized by localized patches of white hair due to a reduction or absence of melanin in hair follicles. Although traditionally associated with the scalp, poliosis can affect any hairy area on the body, including eyebrows, eyelashes, and beards.
As hair pigmentation is a result of complex interaction between various genetic factors, it is thought that premature greying could be due to exhaustion of melanocyte's capability to produce hair pigmentation. [1] Premature canities may occur alone as an autosomal dominant condition or in association with various autoimmune or premature aging ...
Grey or white hair is not caused by a true grey or white pigment, but is due to a lack of pigmentation and melanin. The clear hairs appear as grey or white because of the way light is reflected from the hairs. The change in hair colour occurs when melanin ceases to be produced in the hair root and new hairs grow in without pigment.
A study links graying hair to stem cells getting stuck, unable to color new hair growth. And here's the good news: That might mean gray hair is reversible.
The first thing I did was open my laptop and type: “beautiful women with gray hair,” “young women with gray hair,” “models with gray hair,” “gorgeous gray hair.” Those were all of ...
Your hair color is produced by cells called melanocytes, which produce melanin. Melanin is what gives your hair and skin its color. As you age, you produce less melanin, resulting in gradual graying.
Polish plait (Latin: Plica polonica, Polish: Kołtun polski or plika, Kołtun in Polish meaning matted), less commonly known in English as plica or trichoma, is a particular formation of hair. This term can refer to either a hairstyle or a medical condition, depending on context.
Hair growth on the forehead is suppressed in a bilateral pair of periorbital fields. Without a widow's peak, these fields join in the middle of the forehead so as to give a hairline that runs straight across. A widow's peak results when the point of intersection on the forehead of the upper perimeters of these fields is lower than usual.