Why is some hair curly and some hair straight?
Hair mostly consists of a protein named keratin, which grows from the hair’s follicle. Keratin can also be found in the nail. In fact, up to 90 percent of the hair’s dry weight is keratin. Keratin has a great amount of disulfide which is responsible for the elasticity of hair. Based on the number of disulfide […]
Why is some hair curly and some hair straight? Read More »