Brittle hair is seemingly rather cosmetic than a medical issue, but it may also accompany many pathological conditions including lack of certain substances in our bodies. Therefore, complaints about brittle hair can attract a physician’s attention.
Hair can be damaged by excessive exposure to sunlight, as well as by excessive brushing and hair coloring.
Proteins are the basic building material of all tissues, so it is not surprising that protein deficiency is associated with dry and brittle hair. The problem applies particularly to women with anorexia nervosa and patients with more severe gastrointestinal malabsorption of nutrients.
It has been observed that people exposed to prolonged stress have worse quality of skin and hair.