L-histidine hydrochloride, kuma aka sani da Histidine HCl, shine nau'in hydrochloride na amino acid L-histidine. Yawancin lokaci ana amfani da shi azaman kari na abinci ko azaman ɗanyen abu don magunguna da ƙari na abinci. L-histidine shine amino acid mai mahimmanci, ma'ana ba zai iya haɗa shi da jiki ba kuma dole ne a samo shi daga abinci ko kari.