Biotin, also called vitamin B7, is considered to be the beauty vitamin par excellence as it is responsible for the healthy growth of hair, skin and nails. Biotin prevents split ends, and the hair becomes stronger and shinier. It cannot be produced by the body itself, so it is important to eat it as part of a well-balanced diet. Since this is often difficult to implement in everyday life, it is advisable to take our hair vitamins as a supplement or to apply a several-month conditioning hair treatment to strengthen the hair.