The effort in Europe to label food for multiple societal purposes will eventually find its way to U.S. so policymakers in Washington should pay attention.  There is the traditional battle over how best to convey nutrition information to inform consumers over how to eat better than they do. There is confusion over how best to do this. Back in 1992, U.S. policymakers settled on the curious approach of expressing a product's calories and nutrients at a level consumed by a middle-aged woman lest it over-recommend for that cohort. The idea of simply expressing calorie content and letting each individual figure out their overall caloric needs was rejected. There have been similar straight-forward metrics used in Europe, but others think a s...