L-Lysine HCl USP Powder 100 Mesh Kosher is the hydrochloride salt of the essential amino acid L-lysine, finely powdered for high solubility and ease of use. It is widely used in dietary supplements, pharmaceuticals, and nutraceutical formulations to support protein synthesis, growth, and tissue repair. The USP grade ensures high purity, while kosher certification makes it suitable for dietary compliance. This powder form (100 mesh) allows fast dissolution in liquids and incorporation into food and supplement products.