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Definition of Thiamine
Medically reviewed by Min Clinic Staff | Updated: January 2026
Thiamine: Vitamin B1. Thiamine (vitamin B1) acts as a coenzyme in the metabolism of the body. It is found in pork, organ meats, legumes, nuts, and whole grain or enriched breads and cereals. Deficiency of thiamine leads to beriberi, a syndrome characterized by inflammation of multiple nerves (polyneuritis), heart disease (cardiopathy), and edema (swelling).