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Pseudo-B12

Form

The B12-shaped molecule in most algae and some fermented foods. It registers on some assays and does nothing in humans, so it is tracked separately rather than counted as B12.

Relationships

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Pseudo-B12 form of

Vitamin B12

Needed by methionine synthase and by one mitochondrial enzyme. Absorption needs intrinsic factor, so it fails on stomach problems long before intake does.