As for the insurers, you would think preventing chronic diseases would be good business, but, at least under the current rules, it’s much better business simply to keep patients at risk for chronic disease out of your pool of customers, whether through lifetime caps on coverage or rules against pre-existing conditions or by figuring out ways to toss patients overboard when they become ill.

But these rules may well be about to change … The moment these new rules take effect, health insurance companies will promptly discover they have a powerful interest in reducing rates of obesity and chronic diseases linked to diet.