There is also some scripture (not PC) that makes note of this. The bottom line is eat a balanced diet, and exercise. Radical concept. Jack LaLane could be an example of this. To eat meat sparingly, and drink milk; is NOT vegetarian.
I know quite a few vegetarians who don't eat a speck of meat but do ingest milk products and in general I'd say they are healthier and not as many overweight ones as a random pick of the general population. Also know a bunch of kids who've grown up that way and mostly a very healthy bunch so far - some awesome athletes among them.