In a new study released by the International School for Advanced Studies in Italy, it turns out that the saying, "Your eyes are bigger than your stomach," could be true after all. The study says that not only is vision the main way we make food decisions, but color is a huge factor specifically.
It's not all about disliking vegetables, however. The Daily Mail reported that, according to Raffaella Rumiati, Professor of Cognitive Neuroscience, "Our visual system evolved to easily identify particularly nutritious berries, fruits and vegetables from jungle foliage." While other animals, like dogs in particular, depend on other senses for food, we depend on sight over smell. And the sight is so refined, we are extremely good at distinguishing red food from green.
It also makes sense from a biological standpoint. "The redder an unprocessed food is, the more likely it is to be nutritious, while green foods tend to be lower in calories," as stated. More calories, as we all know, equals more energy so we are sustained for a longer period time, something that was invaluable to the hunter-gatherers before us.
Not only does this seem to explain why most of us disliked vegetables when we were young, but it also explains why so many fast food signs are red and yellow, as opposed to a more food-based color like green.