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Thiamine

By Shereen Jegtvig, About.com

Updated March 17, 2009

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

bread

Thiamine is found in whole grain or fortified bread.

Photo © Andre Lubbe
Definition: Thiamine, or vitamin B1, is a member of the water-soluble family of B complex vitamins. It's required for glucose metabolism so your body can use carbohydrates as energy. Thiamine is also required for normal heart, muscle and nerve function.

Daily Requirements

Males

1 to 3 years 0.5 mg per day
4 to 8 years 0.6 mg per day
9 to 13 years 0.9 mg per day
14+ years 1.2 mg per day

Females

1 to 3 years 0.5 mg per day
4 to 8 years 0.6 mg per day
9 to 13 years 0.9 mg per day
14 to 18 years 1.0 mg per day
19+ years 1.1 mg per day

Thiamine is found in legumes, fish, lean meats, whole grains and fortified breads and cereals. Deficiency may occur in people who consume large amounts of alcohol.

An extreme thiamine deficiency may result in a brain disorder called Wernicke-Korsakoff syndrome. Thiamine supplementation is safe, thought it is probably not needed for people who eat a healthy, balanced diet.

Also Known As: Vitamin B1

Sources:

Medline Plus. "Thiamine." NIH. Updated 01/2007.

Food and Nutrition Board. "Dietary Reference Intakes." Institute of Medicine. Published 2004.
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