Lamberts L-Histidine HCl 500mg are essential amino acid supplements presented in an easy-to-swallow capsule format. Histidine is a precursor to histamine and plays roles in nerve signal transmission and immune system function. These capsules are formulated to provide a measured dose of L-Histidine in its hydrochloride form, which aids in stability and absorption. This supplement is suitable for individuals looking to support various bodily functions mediated by this essential amino acid.