science

Don't forget diabetes.

That is if you eat big animals regularly instead of smaller ones.

Vegans simply ignore the fact that humans are omnivores. One needs enough physical activity as well to reduce the risks for everything that you mentioned.

I know people who ate a lot of meat and did not workout and died early. I know people who are vegetarians who didn't workout and died early as well. In both cases one might die earlier than the other. What matters is a balanced diet, physical activity and the rest of your lifestyle including sleep, sex life, stress and social life as well.