Vitamin B1

Vitamin B1, also known as thiamin, is a water-soluble B vitamin that occurs in the human body as free thiamin and as various phosphorylated forms: thiamin monophosphate (TMP), thiamin diphosphate or pyrophosphate (TTP), and thiamin triphosphate (TPP). Vitamin B1 was the first vitamin identified in 1926.

Authored by Dr Peter Engel in 2010, reviewed and revised by  Angelika Friedel on 29.06.17

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Things to know about Vitamin B1

  • Supply situation

    National nutrition surveys in European countries provide an indication of current intake of some B vitamins. Read More

  • Deficiency

    Severe vitamin B1 (thiamin) deficiency can lead to beriberi, which damages nerves in the legs and arms, damages the heart, and causes brain damage. Read More

  • Sources

    Foods high in vitamin B1 (thiamine) include whole grain cereals, beans, lentils, nuts, lean pork and yeast. Read More

  • Safety

    To date, no well-established toxic effects from the consumption of excess thiamin in food or through long-term oral supplementation (up to 200 mg/day) are known (15, 20). Read More