Eat healthy or else

Thirty years later, I still remember one of the comments from freshman college history class. The professor said "If all you eat is celery, you'll die. Since it takes more calories to eat celery than you get from it."
What that has to do with history, don't ask me.
But Pundette features the current batch of health food crusaders. They want taxes on high calorie foods.
Maybe if celery was tax-free, more people would eat it. Unless my history professor really got around.