All posts tagged: Obesity

Woman eating french fries.

The Palatability Theory

There are clear and unanimous figures that obesity has increased over time, especially in rich nations like the United States. On average people today weigh more and have higher body fat percentages than their recent ancestors at similar ages. But why is that the case? One widespread assumption is the palatability theory. It posits that the primary cause is an increase in reward signals in the modern environment from processed food, mediated by the motivation system in the brain, causing us to overeat.