Claim: Vegans are deficient in Vitamin D3


For instance, this study of vegans and vegetarians found lower levels of vitamin D3 in vegans

Problems With This Argument

1. If you're reading this, you're vitamin D deficient

Most people are vitamin D deficient, so this isn't a vegan-exclusive problem

2. The cited study has limitations

This is a sample of just ~20 of each group, so rather small, and a bit outside the norm as these are a group of self-selected Finns. The study itself acknowledges these limitations and recommends a more complete study.

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