Ah, but what you have all got to remember is that by government nutritional standards there would be no white bread, no salt whatsoever, no saturated fat, so no cheese or butter, no processed meats, so ham's out, only a tiny amount of tuna once a year (too much mercury) but no mayo to mix it with, no eggs, (salmonella, cholesterol) no added sugar including all that is found in any remotely appetising yoghurts, no peanut butter in case someone in the next building falls down dead when Tarquin unzips his coolbag, etc, etc,etc,.
So, unless you send your five year old in with two sticks of celery, some dry wholemeal bread sprinkled liberally with mung means and cress, a dried apricot and a cube of steamed tofu (also useful if they lose they pencil eraser) then you're fucked I mean stuffed.
E numbers, guar gum, aspartame, and transfats from dubious sources found in supposedly healthy 'low-salt low-fat' con-merchant foods, are however, perfectly acceptable by government standards.