The new hair care regimen aids hair health and beauty

 The thiol groups of two cysteine residues can form a covalent bond of several polypeptide chains. And, as such, any change in the cysteine content leads to a change in the hair’s flexibility. The physical properties of human hair are largely determined by the water absorption capacity of its cellular components. This depends on the ratio of hydrophilic to hydrophobic amino acid residues and the degree of protein cross-linking. Under normal conditions, human hair has a water content of 10%, which significantly influences its mechanical properties. 

Conventionally, hair care products targeted keratin or moisture content, but lipids are an important constituent of hair too. They represent 1% -9% of the total mass of hair and play an eminent role in its physiochemical characteristics. For instance, they are essential in giving hair its mechanical strength. The cuticle cells are covered with a thin lipid layer, which is covalently bound to the hair keratin. The internal lipids are situated between the lipid layer and consist of approx. 60% free fatty acids. 

During the process of hair ageing, lipids are gradually lost from the hair. Moreover UVA/UVB and even visible light take part in the destruction of lipids in hair which suffers like our skin from photo-ageing. Up to 40% of all free fatty acids are destroyed during the hair’s ageing process.