In an editorial for Nature, Stephen J. Simpson (academic director of University of Sydney's Charles Perkins Centre) and David Raubenheimer (Leonard P. Ullman chair in nutritional ecology and nutrition theme leader at the Charles Perkins Centre) argue that the obesity epidemic isn't caused by sedentary lifestyles, but by overconsumption, because our appetite control systems are "fooled or subverted" by carbohydrates and fats that mimic proteins.
The ersatz proteins are much cheaper than the real thing, and have also made their way into the feed of livestock and pets. The authors state that "the range of processed food becoming available is evolving faster than our appetite control systems," and argue that the historic shortage of sugars caused us to evolve appetite systems that are bad at judging when we've had enough of them.
These arguments echo many of those raised in The End of Overeating (recently featured in a This Day in Blogging History post), in which former FDA commissioner and MD David A Kessler tries to understand how industrial food science has produced food that is exquisitely engineered to cause overeating and constant cravings. Read the rest