You may have heard of fat-soluble vitamins — these are vitamins that are stored in the body’s fat tissue. These vitamins need to be taken with some sort of dietary fat (such as nuts) in order to be absorbed into your system. Vitamins A, D, E and K are all fat-soluble vitamins. Another type of vitamin is a  water soluble vitamins, such as vitamins C and B, which are not stored in the body’s fat tissue and if needed, must be replaced each day. Again, it’s generally recommended to take vitamins in the morning, but the best time of day for you to take a multivitamin or any supplement is when you are most likely to remember to take it daily.