Shocker. "Some doctors and registered dietitians say they are increasingly seeing people whose desire to eat pure or “clean” food—from raw vegans to those who cut out multiple major food sources such as gluten, dairy and sugar—becomes an all-consuming obsession and leads to ill health. In extreme cases, people will end up becoming malnourished."
There is even a new term for this obsession-Orthorexia Nervosa which is defined as: "an eating disorder that involves obsessive healthy eating, sometimes to the point of malnutrition." This is not yet an official diagnosis in the mental health field but will most likely become one in the near future.
Gluten free, fat free, meat free, dairy free, sugar free and on and on.