Which factors have a damaging effect on the hair?

Environmental factors, such as strong sun, temperature variations and changes in air humidity damage the hair cuticle. Because of this the hair changes its properties: it loses its shine and suppleness, becomes dry and brittle and in some cases its strength is impaired.The condition of hair and the attractiveness that results from it are influenced not just by the environment but also by the way we handle and manage our hair and by our general well-being. The hair is mostly damaged by chemical and thermal processes and by excessive use of hairstyling products.

Two very common causes are improper care and use of inadequate or low quality hair care products. Hair damage may also result from long-term stress, illness, medication, hormonal changes, or it may be an indicator of an imbalanced diet, deficient in vitamins and minerals.