Why Does Humidity Cause Frizzy Hair?
Hair Structure and Composition Hair is made up of three layers, the cuticle, cortex and medulla. The cuticle is the outermost layer, composed of keratinized scales that protect the inner layers. The cuticle layer also affects the appearance of the hair. The cortex is made up of two protein layers, sandwiched side by side, and this layer also affects the hair’s appearance. The medulla is the innermost layer and does not influence the hair’s appearance or texture. Hair proteins are composed of long chains of amino acids containing hydrogen, sulfur, carbon and oxygen ions that hold the hair strands together and determine the texture and curl pattern. The combination of these ions also forms water within the hair shaft. Humidity and Hair Texture Hair texture is also determined by three different types of bonds: hydrogen bonds, salt bonds and disulfide bonds. Salt and hydrogen bonds are easily affected by heat and moisture. Disulfide can only be broken with a chemical agent. When the hair e
