[RetroTechie]

That's just nonsense. There are vegan bodybuilders & other top athletes out there.

I've been vegetarian since I was ~10y old, now 50+ and bordering on vegan, and doing fine health wise. If not better than many peers my age.

It's just a matter of making sure you get all vitamins, minerals & other nutrients the body needs. As opposed to just dropping food categories & hope for the best.

For vegans in particular, that means vit. B12 supplements, and have a good look at things like calcium and iron intake. But with that in order: NO problem.