Hair color is the pigmentation of hair follicles due to two types of melanin: eumelanin and pheomelanin. source
Hair color is the pigmentation of hair follicles due to two types of melanin: eumelanin and pheomelanin.
Generally, if more eumelanin is present, the color of the hair is darker; if less eumelanin is present, the hair is lighter. source
Generally, if more eumelanin is present, the color of the hair is darker; if less eumelanin is present, the hair is lighter.
The darker a person's natural hair color is, the more individual hair follicles they have on their scalp. source
The darker a person's natural hair color is, the more individual hair follicles they have on their scalp.
Levels of melanin can vary over time causing a person's hair color to change. source
Levels of melanin can vary over time causing a person's hair color to change.
Particular hair colors are associated with ethnic groups. Gray or white hair is associated with age. source
Particular hair colors are associated with ethnic groups. Gray or white hair is associated with age.
Named after Eugen Fischer and Karl Saller (de), is used in physical anthropology and medicine to determine the shades of hair color. source
Named after Eugen Fischer and Karl Saller (de), is used in physical anthropology and medicine to determine the shades of hair color.
Two types of pigment give hair its color: eumelanin and pheomelanin. source
Two types of pigment give hair its color: eumelanin and pheomelanin.
The genetics of hair colors are not yet firmly established. source
The genetics of hair colors are not yet firmly established.
According to one theory, at least two gene pairs control human hair color. source
According to one theory, at least two gene pairs control human hair color.
Black hair is the darkest hair color, It has large amounts of eumelanin and is less dense than other hair colors. source
Black hair is the darkest hair color, It has large amounts of eumelanin and is less dense than other hair colors.
Children born with some hair colors may find it gradually darkens as they grow. source
Children born with some hair colors may find it gradually darkens as they grow.
Changes in hair color typically occur naturally as people age, eventually turning the hair gray and then white. source
Changes in hair color typically occur naturally as people age, eventually turning the hair gray and then white.
More than 60 percent of Americans have some gray hair by age 40. source
More than 60 percent of Americans have some gray hair by age 40.
Albinism is a genetic abnormality in which little or no pigment is found in human hair, eyes, and skin. source
Albinism is a genetic abnormality in which little or no pigment is found in human hair, eyes, and skin.
Hair color can be changed by a chemical process, Hair coloring is classed as "permanent" or "semi-permanent". source
Hair color can be changed by a chemical process, Hair coloring is classed as "permanent" or "semi-permanent".
"Rinses" are a form of temporary hair color, usually applied to hair during a shampoo and washed out again the next time the hair is washed. source
"Rinses" are a form of temporary hair color, usually applied to hair during a shampoo and washed out again the next time the hair is washed.
