Deficiency of vitamin K increases blood clotting time. So, vitamin K is helpful in blood clotting. It is a fat-soluble vitamin. Vitamin C is used to prevent and treat scurvy. It is a water soluble vitamin. Vitamin B are also water soluble and play significant roles in cell metabolism and synthesis of RBC. Vitamin E is a fat-soluble vitamin. Deficiency of it may cause increased fragility of RBCs, nerve problems and mascular weakness. Vitamin E is a fat-soluble anti-oxidant which protects cell membranes.