Table of Contents (click to expand)What Determines The Natural Shape Of Hair?How Does Heat Styling Change The Shape Of Hair?Can You Permanently Change The Shape Of Hair?Why Does Styling Damage Hair? Hair is made up of proteins called keratin and melanin, which are arranged in a cortex. The cortex determines the hair’s natural shape, which is determined by the follicle. Heat styling rearranges the proteins by breaking the hydrogen bonds between them. This is a temporary change. Permanent changes are made by breaking the disulfide bonds between the sulfur atoms in the proteins. This is done by adding or removing … Continue reading What’s The Science Behind Hair Straighteners/Curlers?