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Vitamin B1 (Thiamine) and your healthAlso known as thiamine, vitamin B1 is a water-soluble substance, necessary for carbohydrate metabolism, neural and cardiac functions, immune system as well as cell formation. It needs to be ingested every day, primarily due to near-zero neural storage capacity for the vitamin.
Vitamin B1 is relatively abundant in food sources, but at the same time easily destroyed (by water and heat) or inhibited (by excessive alcohol, sugar, or by chlorine in drinking water). It is also destroyed by thiaminase, an enzyme produced by Candida albicans. Prolonged deficiency can result in digestive disorders, muscular weakness (including heart muscle), edema, and various disturbances of the neural function.
Excessive intake of vitamin B1 is unlikely to cause serious symptoms, if any. However, its role in the synthesis of DNA precursors may result in it being in effect accelerating cell proliferation of existing tumors. In such circumstances, limiting the intake can be beneficial.
Vitamin B1 DRI (Dietary Reference Intakes, the most recent set of dietary recommendations set by the government) is 1.1mg a day for an average healthy adult female, and 1.2mg for a male.
Best natural food sources of vitamin B1 are whole grains, brewer's yeast, nuts and seeds.