Vitamin B1 acts as a coenzyme necessary for the conversion of carbohydrates into glucose, which is burned in the body or energy. It is essential for the functioning of the nervous system, and severe deficiency can cause Beriberi, a disease marked by weakness, paralysis and oedema. Possible signs of marginal B1 deficiency include fatigue, mental impairment, depression and numbness or tingling in the extremities. Food sources of thiamin include brewer's yeast, whole grains, nuts and beans.

Vitamin B1 (Thiamin) has several functions and health benefits. Vitamin B-1, or Thiamin, is a water-soluble vitamin known for its ability to bolster the nervous system. Like the other vitamins in the B Complex, Vitamin B-1 helps to maintain proper metabolic functioning and is essential for well-being. In addition to contributing to energy metabolism, Vitamin B-1 aids in carbohydrate and sugar metabolism. Athletes and those who engage in regular, intense exercise may require additional intakes of this important vitamin.