Being obsessed about eating healthy seems like a positive thing, but problems arise when a person's healthy lifestyle becomes so overwhelming that it pushes other activities and interests to the periphery, and interferes with relationships and day-to-day responsibilities. As the quality of their diet increases, the quality of their life decreases. It can ironically lead to unhealthy consequences like malnutrition or starvation (anorexia orthorexia).
This is not to say that those who have diet restrictions such as vegans or those following a macrobiotic diet have orthorexia. It has to do with the rigidness of the lifestyle, and whether or not it's actually detrimental to a person's health. While some mental health professionals classify orthorexia as an obsessive compulsive disorder, others think orthorexia isn't a real disorder at all. What do you think?