Quit a few, actually, though there's one very important one related to the health of not only vegetarians themselves, but also the animals they are not eating. Did you know a vegetarian diet can reduce the overuse of antibiotics? Using too many antibiotics is sadly very common when raising animals for meat. Take the US as and example; 70% of antibiotics sold here go to livestock like cows, pics, and chickens to prevent the spread of disease in factory farms where they live cramped together. Using such a large amount of antibiotics can create deadly antibiotics-resistant bacteria that can harm or even kill both animals and humans.