Flutterby™! : Vegetarians and health

PLOS ONE: Nutrition and Health – The Association between Eating Behavior and Various Health Parameters: A Matched Sample Study, Burkert, Muckenhuber, Großschädl, Rásky, Freidl

... Our results revealed that a vegetarian diet is related to a lower BMI and less frequent alcohol consumption. Moreover, our results showed that a vegetarian diet is associated with poorer health (higher incidences of cancer, allergies, and mental health disorders), a higher need for health care, and poorer quality of life. ...

Via Grist. Correlation is not cause, this could also be why, anecdotally, so many people in the health food store seem unhealthy...