Vitamin B1, also called thiamin, was the first B vitamin discovered. Every cell in your body needs thiamin to make adenosine triphosphate, or ATP, the body's main energy-carrying molecule. The heart, in particular, has considerable need for thiamin in order to keep up its constant work. Severe deficiency of thiamin results in beriberi, a disease common in the 19th century, but rare today. Many of the principal symptoms of beriberi involve impaired heart function.
Your need for vitamin B 1 varies with age. The official US and Canadian recommendations for daily intake are as follows:
- 0-6 months: 0.2 mg
- 7-12 months: 0.3 mg
- 1-3 years: 0.5 mg
- 4-8 years: 0.6 mg
- 9-13 years: 0.9 mg
- 14 years and older: 1.2 mg
- 14-18 years: 1.0 mg
- 19 years and older: 1.1 mg
- Pregnant or Nursing Women : 1.4 mg
Although vitamin B 1 deficiency is rare in the developed world, it may occur in certain medical conditions, such as alcoholism
Brewer's and nutritional yeast are the richest sources of B 1 . Peas, beans, nuts, seeds, and whole grains also provide fairly good amounts.
A typical dose of vitamin B1 for therapeutic purposes is 200 mg daily, although much higher dosages have also been tried.
Some nutritional experts recommend taking B 1 with other B vitamins in the form of a B-complex
Other potential uses of thiamin have even less scientific support.
2. Shimon I, Almog S, Vered Z, et al. Improved left ventricular function after thiamine supplementation in patients with congestive heart failure receiving long-term furosemide therapy. Am J Med. 1995;98:485-490.
5. Tang AM, Graham NHM, Kirby AJ, et al. Dietary micronutrient intake and risk of progression to acquired immunodeficiency syndrome (AIDS) in human immunodeficiency virus type 1 (HIV-1)-infected homosexual men. Am JEpidemiol. 1993;138:937-951.
12. Shimon I, Almog S, Vered Z, et al. Improved left ventricular function after thiamine supplementation in patients with congestive heart failure receiving long-term furosemide therapy. Am J Med 1995;98:485-490.
Last reviewed April 2009 by EBSCO CAM Review Board
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