Have you ever tried Emergen-C? It is packets of vitamin powder that you put into water. There are many different flavors and combinations of vitamins and minerals. In a 6-8 oz. glass of water, it makes a fizzy drink that is not too sweet.

When I first started drinking it, I put a packet or two into a 32 oz. bottle of water and sipped it throughout the day. It's made a difference for me. ( I have trouble eating or finding an appetite sometimes because of my meds.)