Found almost only in animal foods. Lifelong for vegans and commonly needed over 60.
What the evidence supports: correcting deficiency and preventing neurological damage.
This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.
Ongoing for vegans, over-60s, and anyone on metformin or long-term acid blockers. Nerve damage from prolonged deficiency can become permanent.
Plant-based eaters, older adults, people on metformin or PPIs, and anyone post-bariatric surgery.
Other supplements:
Run your full list through the interaction check.