[spraak]

I'm curious what else you think is missing in a vegan/vegetarian diet, because calcium is not one of them, and even "omnivores" are recommended to supplement B12 - it's produced by soil bacteria that we would in the past get from fresh vegetables, and that's how animals should get it, too, but even now meat animals are given B12 supplements.

[jniedrauer]

Calcium is most certainly an issue. A lot of vegan dairy substitutes are already fortified with calcium for this specific reason.

I'm still learning this stuff myself. But from the things I've read so far, vegans (especially the WFPB variety) can have difficulty getting: Vitamin B12, calcium[0], iron, and possibly a balanced amino acid profile if they have elevated protein requirements. A diet too high in carbs and too low in fat and protein can also cause long term problems like candida overgrowth and hormonal imbalances.

[0]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3967195/