Doesn't needing supplements prove veganism is unnatural?

The objection

“If you have to take a pill to survive on it, your diet is fundamentally unnatural and wrong for humans.”

The answer

There’s a real instinct here worth respecting: if a diet can’t stand on its own, that’s a fair flag. Apply the test honestly, though, and it fails to single out veganism.

Start with the one supplement that genuinely matters, B12. It isn’t made by animals at all. It’s made by bacteria, and farmed animals get it from soil, contaminated water, or, routinely in modern intensive systems, cobalt and B12 added straight to their feed. The omnivore eating “natural” meat is often just laundering a supplement through a cow. Taking B12 directly cuts out the middle animal, and there’s nothing more natural about the longer route.

Then widen the lens. The modern omnivore diet is drenched in fortification: iodised salt (preventing goitre worldwide), folic-acid-fortified flour (which slashed neural-tube birth defects), vitamin-D-fortified milk and cereals, iron-enriched bread. None of that is “natural” either. It’s deliberate public-health engineering that quietly protects everyone, meat-eater included. Half the supplement aisle is bought by omnivores.

The “natural” argument also proves too much. Insulin, vaccines, spectacles and cooked food are all unnatural, and plenty of natural things will kill you. Natural is not a synonym for good.

So here is the shape of it: a well-planned vegan diet relies on essentially one reliable supplement, B12, against an omnivore diet propped up by an entire fortified food supply. “Is it natural?” was always the wrong question. The question worth asking is whether it’s healthy, and the evidence says a planned plant diet is.