Calories per dollar to measure U.S. health

Here is an interesting piece found in today's San Francisco Chronicle.
Written by a doctor, not an economist, it is reminiscent of Michael Pollan's landmark article in the NYT -which made the case to re-visit Farm Bill's subsidies in order to make healthy produce competitive with commodities -corn, soy, etc.- that are staples for junk food.
Another spin on the idea that healthy food access should be a priority to our representatives.