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Vitamin B1 (unspecified) — answers to thiamin

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A B vitamin required for carbohydrate metabolism and nerve function.

Why it’s used

Taken to meet daily thiamin needs and to correct or prevent deficiency, which can occur with poor diet or certain health conditions.

What the evidence is for

preventing and correcting thiamin deficiency.

What the evidence says

NIH's Office of Dietary Supplements describes thiamin's established role in energy metabolism and its well-documented use in preventing and treating deficiency, including beriberi and Wernicke-Korsakoff syndrome in clinical settings. Outside of deficiency correction, evidence for benefits of supplementation in people who are not deficient is limited.

Dose studied

1.1–1.2 mg — adult RDA, per NIH ODS.

Context

The adult RDA is 1.1-1.2 mg per day, per NIH ODS. No tolerable upper intake level has been established, as thiamin has not been shown to cause harm at typical intakes.

Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.