Eating, for most of us, isn’t merely the necessary intake of nourishment. It’s also a pleasurable act, particularly when we, depending on our personal preferences, dig into a thick slice of cream gateau, a juicy joint of pork or bag of chips. But there are people who avoid all these sweet and fatty goodies as a matter of principle. Their diet consists solely of food seen as “healthy.” This eating behaviour is known as orthorexia nervosa, or simply orthorexia. The term, derived from Greek, literally means “correct appetite,” although “correct diet” would be more accurate. “Nervosa,” a Latin wor…