Bonds are attractive forces between atoms in hair (like hydrogen and sulfur) that hold its structure together. “Hair is primarily made of the protein keratin,” says Bridgette Hill, a certified trichologist (hair expert) in New York City and Palm Beach, FL. “Bonds connect keratin proteins, forming the structure of the hair fiber.” They allow strands to be altered by heat, cold, chemicals and tension, and contribute to the superficial repair of hair as well as moisture retention and elasticity, she explains. When bonds are broken, hair can look and feel damaged, frayed, brittle and dry. The three main types are:
1 HYDROGEN BONDS
The weakest type of bond, prevalent throughout hair’s cortex (middle layer), helps give hair strength, elasticity and ability to return to its natural shape after exposure to…
