Twinkies-flickr-bill-stevensonHo-Hos, Little Debbies, Twinkies: if you were on a diet of snack cakes, would you lose weight? Mark Haub, a Kansas State nutrition professor, did. He lost 27 pounds in 10 weeks by replacing three meals a day with a sugary treat.

His trick: even with the junk food, he cut his total daily calorie intake from 2,600 per day to down to 1,800. He supplemented the sugary treats with fresh veggies and a daily protein shake; but he trimmed meat, dairy, and most starches from his diet, leaving junk food as his main source of calories. But despite the junk food, he not only lost weight, he even wound up with a better cholesterol balance.

But don’t go reaching for that snack cake yet. Most of us don’t have Haub’s discipline: we clean our plates, and then reach for the snacks. And our food system makes overeating shockingly easy. Between 1970 and 2004, “empty calories” soared (data from the USDA’s “food availability” database):

Food availability chart

With such a huge increase the food system’s production of empty calories, they’re now dirt cheap, even as the price of fruits and vegetables has risen. This creates a huge problem for people who don’t have the money for fresh, healthy foods: an abundance of cheap, empty calories means we’re eating more total calories. And as Haub’s experiment with his own diet shows, it’s a rise in total calorie consumption, rather than junk food per se, that’s expanding our waistlines.

Twinkies photo courtesy of Flickr user Bill Stevenson under the Creative Commons license.