Originally Posted by
Viriato
Diet, lifestyle, exercise, social interactions, social status, education level, gender and of course genetics all seem to affect overall life expectancy, diet is just one component of total life expectancy. I would still say that being vegan in most cases improve your quality of life and it makes you less likely to get cancer, lower risk of diabetes and lower risk to be overweight.
Some people do experience headaches or feel ill when converting from a meat diet to a vegan diet, you should try to get info from a nutrition adviser if you ever want to give veganism another try. You might feel so because your body is detoxing. I recommend people to start introducing some vegan meals per day untill you fully convert to veganism, instead of going vegan from day to night (which can also work for some people, for me it did, but for others it might not).