Is there a liquid vitamin that is effective? I've looked in the grocery store but haven't really seen any.

I'm not sure where in the system that a vitamin dissolves - I am trying to add more nutrients to my body. Everything leaves my system very quickly. I need to add protein somehow too but digesting meat is a really problem, beans and cheese are out too.

Any suggestions? I just need to get started until I feel better and can add more to my diet. Instant oatmeal with milk and non-sugar peanut butter on grain bread is about it now.