Used as a dietary supplement to prevent or treat thiamine deficiency, commonly associated with conditions like beriberi and Wernicke-Korsakoff syndrome. Frequently added to enriched flour and cereals to restore vitamin B1 lost during processing. Employed in pharmaceutical formulations for oral, intravenous, or intramuscular administration. Utilized in animal feed to support growth and metabolic function. Also applied in cell culture media to support microbial or tissue growth requiring thiamine as a growth factor.