As opposed to proper vegans, who live forever?
>And if you believe that nothing you can eat can be toxic to your body, you already lost in life.
Plenty can be toxic, including all kinds of plants (heroin is made from a plant). But the best diets according to longevity statistics and scientific studies still include meat, e.g. the Mediterranean diet.
Or you can ignore those, and opt for some semi-mystical, culting fad diet.