Top topic this week
Questions asked by users might not always be phrased in the clearest way.
Hair is primarily composed of a protein called keratin. Keratin is made up of amino acids, which contain the elements carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and sulfur (S). In addition to these primary elements, hair may also contain trace amounts of other elements, such as zinc (Zn) and iron (Fe).