How do we know that our hair is damaged?

Hair condition is evaluated by using criteria such as suppleness, shine and easy combing. Loss of suppleness is often a consequence of mechanical damage and chemical processes. The cuticle of a damaged hair fibre has an uneven surface, with many scraps, indents, cracks and typical jagged edges visible under the microscope. Cuticular scales are parted and damaged, which makes the hair is dry and porous. Damaged hair is: