A little story that I read in Dick Winter's Memoir's, about their day's version of mre's (I think they're called K-Rations), was there was this packet of stuff that made Lemonade. Everyone hated it, so they just threw it out.
What they didn't know, was in that lemonade packet, was 100% of their intake of Vitamin C. None of the rest of the "food" had any Vitamin C.
After going a month in Normandy, everyone started developing cavities. Leading to visits to in-the-field Dentists.
Lets just say, that didn't go too well.
So, hoping they fixed the rationing of vitamins and minerals in the entire mre, and not just in the shitty packet of imitation beef stew.