B vitamins are vital for carbohydrate, fat & protein metabolism & the conversion of food to energy. They help maintain clear eyes, & healthy looking skin & healthy hair. This probably is the reason so many women take a B Complex supplement as part of a nutritional daily beauty care programme. Being water soluble the nutrients are excreted in the urine if too much is taken. A well balanced, good quality formulation is all that's required for the necessary part it can play as a food supplement.