The expression “normal hair” usually refers to all the ideal situations in which no particular abnormalities affect the look of skin and hair. The hair is shiny, strong and healthy. Several factors can gradually undermine this ideal state of balance, both exogenous and endogenous. For this reason, it is essential to use only the most delicate products. Therefore, it is advisable to use treatments formulated to cleanse the hair gently, avoiding the aggressive action of SLES (Sodium Laureth Sulfate) or SLS (Sodium Lauryl Sulfate). In order to keep the natural balance of the keratin structure of the hair unaltered it is advisable to apply a mask or a nourishing compress at least twice a month.