List of vitamins, their solubility (in fat or water) and recommended dietary allowances for men / women. Data from the US Food and Nutrition Board, Institute of Medicine, National Academies Vitamin A Fat 900ug/700ug Vitamin B1 Water 1.2mg/1.1mg Vitamin B2 Water 1.3mg/1.1mg Vitamin B3 Water 16mg/14mg Vitamin B5 Water 5mg Vitamin B6 Water 1.5mg/1.4mg Vitamin B7 Water 30ug Vitamin B9 Water 400ug Vitamin B12 Water 2.4ug Vitamin C Water 90mg/75mg Vitamin D Fat 15ug Vitamin E Fat 15mg Vitamin K Fat 110ug/120ug --- Data for guidance only, consult your physician ---