I think it is a fine idea, but I don't think it will be effective. Has the average person become heavier or lighter since the introduction of the Nutrition Fact

I think it is a fine idea, but I don't think it will be effective. Has the average person become heavier or lighter since the introduction of the Nutrition Facts Label on packed food was introduced in the 90's? The issue is the length of the feedback loop and the power of momentum. I saw some other stat that showed even after heart attacks only 30% of people changed their lifestyles.