Myth: If vegans need supplements like B12, it proves the diet is unnatural and inadequate

Quick Answer

## Common Objections ### "If B12 only comes from animal foods, doesn't that prove veganism is unnatural?" B12 is produced by bacteria, not by animals. Additionally, the "natural = good" reasoning is a well-established logical fallacy (the appeal to nature). Supplementation is simply another tool for nutritional adequacy.

Supported by 1 cited source

What People Usually Mean

The claim: "Needing supplements proves veganism is unnatural/deficient."

Key Points

1Animals accumulate B12 because their feed is supplemented or they ingest soil-dwelling bacteria.
2In modern industrial farming, livestock are supplemented with B12 — meaning omnivores are also getting their B12 through supplementation, just indirectly through the animal.
3Cooking, refrigeration, pasteurization, and water purification are all "unnatural" interventions that dramatically improve health outcomes.

Evidence Summary

Why this argument fails:

1. Livestock are supplemented too:

Factory-farmed animals receive B12 supplements or cobalt (to produce B12)
Most animal B12 comes from supplementation, not "natural" processes
Eating meat = taking supplements with extra steps

2. B12 comes from bacteria, not animals:

B12 is synthesized by bacteria
Historically found in soil, water, fermented foods
Modern sanitation removed these sources (a good thing)
Animals don't make B12—their gut bacteria do, or they're supplemented

3. Many people need supplements regardless of diet:

Vitamin D (most people in northern latitudes)
Folate for pregnant women
Iron for many menstruating people
B12 for elderly (absorption decreases with age)
Iodine in many regions

4. "Natural" is not the standard:

Cooking is unnatural (fire is technology)
Agriculture is unnatural
Medicine is unnatural
We do many "unnatural" things that improve our lives

5. Supplementation efficiency:

Direct supplementation:

More efficient (no animal intermediary)
More sustainable (less resource use)
More ethical (no animal suffering)
More reliable (consistent dosing)

What this argument reveals:

Selective application of "natural" standard:

Meat-eaters use supplements, fortified foods, medicines
Factory farming is certainly not "natural"
The argument is often used to dismiss veganism while ignoring parallel issues

Historical context:

Human diets have always varied by geography and season
No single "natural" human diet exists
We've always adapted our food sources
Modern supplementation is just another adaptation

Supporting Evidence

Sources:

Catherine F. Hughes, Mary Ward, Leane Hoey, Helene McNulty. Vitamin B12 and ageing: current issues and interaction with folate (2013)

The Bottom Line

The supplement argument, if consistently applied, would indict modern food systems generally, not veganism specifically. Evidence quality: Based on nutritional biochemistry and agricultural practices research.

Supplements prove veganism is unnatural