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Name des Begriffes: Vitamin B1

Short introduction

  • Vitamin B1, thiamin or thiamine, is a water-soluble vitamin of the B-complex.
  • All B-vitamins are water-soluble, meaning that the body does not store them; they are excreted via the urine.
  • This vitamin is named B1, because it was the first B-vitamin discovered.

Main natural sources

  • Found in a wide variety of foods at low concentrations.
  • Best sources: yeast extract, pork, ham, tuna fish, legumes (beans, peas lentils), nuts, whole grain products.

Main function

  • Component of a coenzyme (helper enzyme) that assists in the production of energy from food in the metabolism of carbohydrates, specific amino acids and fatty acids.
  • Involved in the production of nucleotides as building blocks for DNA and RNA (encodes genetic instructions used in development and functioning of living organisms).

Deficiency disease

  • Common in low-income populations (a diet high in refined carbohydrates and low in thiamin). Symptoms e.g.: fatigue, poor memory, sleep- disturbances and irritability.
  • Major diseases: beriberi (3 forms: dry, wet and infantile) and Wernicke-Korsakoff (in alcoholics). These diseases affect the nervous and cardio-vascular system.

Recommended daily intake

Latest Dietary Reference Intakes  (DRIs)
Institute of Medicine (IOM)

Age categoryPer day
Pregnancy
Lactation
1.4 mg (RDA)
1.4 mg (RDA)
Infants 6 – 12 months0.3 mg (AI)
Children
 1 – 3 years
 4 – 8 years
0.5 mg (RDA)
0.6 mg (RDA)
Males
 9 – 13 years
14 – 18 years
19 – 30 years
31 – 50 years
50 – 70 years
> 70 years
0.9 mg (RDA)
1.2 mg (RDA)
1.2 mg (RDA)
1.2 mg (RDA)
1.2 mg (RDA)
1.2 mg (RDA)
Females
 9 – 13 years
14 – 18 years
19 – 30 years
31 – 50 years
50 – 70 years
> 70 years
0.9 mg (RDA)
1.0 mg (RDA)
1.1 mg (RDA)
1.1 mg (RDA)
1.1 mg (RDA)
1.1 mg (RDA)

 

AI = Adequate Intake.
RDA = Recommended Dietary Allowance.

Synonyme: Thiamin, B1, Thiamine

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