L-Histidine Hydrochloride FCC is the hydrochloride salt of the essential amino acid L-histidine, used widely in food, pharmaceutical, and nutraceutical applications. It is a key precursor for histamine, contributing to immune response, gastric acid regulation, and neurotransmission. Its FCC grade ensures food safety and high purity, making it suitable for dietary supplements, fortified foods, and clinical nutrition. L-Histidine supports growth, tissue repair, and metabolic functions in humans and animals.