Diet and Nutrition Watch
M (specialist biology tutor)
That said, the health benefits can vary dramatically at an individual level. In other words, people who are careless about the potential hazards of their diet - no matter whether it is vegan, vegetarian or meat-eating - are prone to various diet-related illnesses. A vegan diet has certain well-know pitfalls, and it does need more effort nd understanding to avoid certain acute deficiency diseases.
On the other hand, there are well accepted ecological benefits to plant-based diets, including a drop in greenhouse gas production, less intensive land use, lower pollution by nitrogen fertilisers etc