Yes. My idea--maybe it's the same idea you have--is that you don't need to make all the labels harmonized all at once. I think one label would be enough and maybe people would start thinking about it.
You probably know this more than I do, but for vitamin C, the daily recommended intake in the U.S. is, what, 310 milligrams? It's different. In Canada it's 300 milligrams. What's up with that? Flip a coin and say it's 300 milligrams or it's 310 milligrams. It makes no difference, because it's still 2%. Or split it in the middle, at 305 milligrams.