What is it?
Thiamin is a water-soluble vitamin. Its coenzyme form is thiamin diphosphate, also called TDP or TPP.
What does it do?
It participates in reactions that use carbohydrates and certain amino acids. This role does not equate to a stimulating effect from additional administration.
Absorption and use
Intestinal absorption also depends on the amount consumed. A single percentage does not describe every food or preparation.
Two routes, different evidence
By mouth
No single percentage is assigned to all forms, doses and conditions. See the context in the relevant section.
Intravenous
Intravenous administration bypasses the intestine. This describes the route of administration; it does not demonstrate clinical benefit or greater effectiveness.
Foods and nutritional context
Whole grains, legumes, pork and fortified foods can contribute to intake.
Understanding requirements
Dietary references concern thiamin in the diet; they do not establish an injectable dose.
Deficiency, excess and limitations
A significant deficiency can impair the nervous system and other functions. General symptoms do not allow it to be identified without assessment.
Sources and further reading
For information. A substance’s physiological role does not establish the effectiveness of an infusion.