> I think it's relatively uncontroversial that malnutrition has mental health side effects. Perhaps, but I think the next step, showing that vegetarian diets /

> I think it's relatively uncontroversial that malnutrition has mental health side effects. Perhaps, but I think the next step, showing that vegetarian diets / vegan diets are more likely to have poor nutrition, is harder. There's a portion of meat-eaters who live on terrible diets and don't get enough nutrition due to their primary source of vegetables being the potatoes in fries. Is that portion more or less than the portion of vegans/vegetarians that have poor nutrition? Studies about diets and longevity usually show vegans and vegetarians living mildly longer than typical meat eaters, which to me seems like at least a small data-point that nutritional deficiencies aren't more pronounced in the former group.