Would a rat risk dying just to satisfy its desire for chocolate?
I recently found out. In my laboratory, we gave rats unlimited access to their standard fare as well as to a mini cafeteria full of appetizing, high-calorie foods: sausage, cheesecake, chocolate. The rats decreased their intake of the healthy but bland items and switched to eating the cafeteria food almost exclusively. They gained weight. They became obese.
To read the full, original article click on this link: Is Obesity an Addiction?: Scientific American
