lol. I get your point, but look at what's happened with smoking. A lot less people smoke now than 20-30-40 years ago. Getting the information out there helps. Yes, mcdonalds tastes good and is easier than finding healthy food, but why is that? It's connected to what I was saying about farm subsidies. Corn is VERY heavily subsidized and even insured. You may ask, are vegetable treated the same way? The answer is no, they're not. Grow healthy fruits/vegetables and you get no subsidies. Be Monsanto or ConAgra and grow sh!t tons of corn and meats full of hormones and are genetically modified, get a ton of subsidies. See how this works? lol. If one had incentive to eat healthy, one would more likely(not will) eat healthier. If healthy food was cheaper than mcdonalds, people would buy it more, period. But when you can get in 300+ calories for $1 at mcd's, why are you gonna spend $5 to get 300 calories from fruits or veggies?
As I said, the whole subsidies providing incentives to eat crappy food is a whole other discussion, but very related to health and healthcare.
At best this stuff will help out at the margins. Even the decrease in smoking rates hasn't helped all that much. Smoking is also a different kind of animal than junk food. Hard to explain why, but it just is.
The best you can hope for is to tax consumption of unhealthy stuff to pay for the costs of treating the medical consequences. But again, that's a tax on poor people.