Experiments have shown that you can satisfy your appetite just by looking at pictures of food.

More than a thousand people took part in a series of experiments. They were first shown pictures of M&Ms and then asked how many candies they wanted to eat. People asked for a smaller amount if they had looked at a lot of food photos before. Scientists explain that appetite is closely related to cognitive perception. The participants in the experiment received a physiological response to what they thought, so they could feel completely satisfied without eating anything.