I know some foods are "red flagged". I like energy drinks once in a while. I like candy and instant pudding...
The point is, I'll probably die of an enemy missile than diabetes or a heart problem. I make it a practice to keep buying stuff I would want, not necessarily what's best vitamin wise. I don't eat a lot of it, but in a conflict would want it.
As for sneaking in resupply, it's as easy as taking two socks, putting a backpack filled with ammo and tinned meat hanging in a tree where you're expecting it. Don't assume it needs to be a commando mission.
CK