Do if you have dry hair: choose the right care! Nutrifier by Série Expert (L’Oréal Professionnel) is the range to remember if your hair is dry and lacking in hydration. These professional hair products act on the nutrition of the fiber. The hair is much more hydrated and silkier, which transforms the hair into a noticeably softer material. Cleverly composed, Nutrifier treatments mimic the natural nutritional elements of fiber, providing results of rare quality.