Vitamin B1, thiamin, or thiamine, enables the body to use carbohydrates as energy.
Thiamine, also known as thiamin and vitamin B1, is a vitamin, an essential micronutrient, which cannot be made in the body. It is found in food and commercially synthesized to be a dietary supplement or medication. Food sources of thiamine include whole grains, legumes, and some meats and fish. Grain processing removes much of the thiamine content, so in many countries cereals and flours are enriched with thiamine. Supplements and medications are available to treat and prevent thiamine deficiency and disorders that result from it, including beriberi and Wernicke encephalopathy. Other uses include the treatment of maple syrup urine disease and Leigh syndrome. They are typically taken by mouth, but may also be given by intravenous or intramuscular injection.
Thiamine supplements are generally well tolerated. Allergic reactions, including anaphylaxis, may occur when repeated doses are given by injection.Thiamine is required for metabolism including that of glucose, amino acids, and lipids.Thiamine is on the World Health Organization's List of Essential Medicines. Thiamine is available as a generic medication, and as an over-the-counter drug.