I was going to suggest vitamin B-12 and vitamin C.
Outside of that, I want to talk about something a little bit more globally minded. Even in Canada 20 or 30 years ago we knew the population was not getting the requisite amount of their daily vitamin intake, so we fortified foods to make sure that in some ways the population got the bare minimum.
I think maybe five or 10 years ago there was a French company that came up with a product called Plumpy'Nut. I don't know if you remember.