> and the missing nutrients can be acquired even on a plant-based diet. Vitamin B12 is a notable exception - there are no plant-based foods which are a signifi

> and the missing nutrients can be acquired even on a plant-based diet. Vitamin B12 is a notable exception - there are no plant-based foods which are a significant (or reliable!) B12 source that I'm aware of. Other B vitamins: yes. B12: no. Vegans should either supplement, or (possibly after a looong time) will develop a chronic shortage. Calcium (not mentioned in the article) is another one. Many plant-based 'milks' are fortified with it. But if not (or people not drinking these regularly) getting enough calcium from a plant-based diet is tricky. There are other ones to keep an eye on (iron comes to mind) but usually less of an issue.