Scientists: Ancient Signal Directs Appetite for Nutrition

Amanda Onion at ABC News:

Foods_050408_tNeuroscientists working separately at the University of California at Davis and at New York University School of Medicine have revealed an ancient “switch” in some mammals that signals the appetite to seek foods with perfect nutritional balance.

The mechanism has been found in rats, mice, slugs, even yeast and, the researchers say, there’s every reason to believe it also exists in people.

More here.