L-lysine is an amino acid that supports antibody, hormone and enzyme production, as well as providing antioxidant properties. L-lysine competes with L-arginine that is required for the replication of upper respiration pathogens. L-lysine also supports collagen formation and tissue repair to promote healthy skin. Available in a delicious chew, L-Lysine by Pet Naturals is perfect for multi-cat households, boarding, kittens, and senior cats. For animal use only. Store in a cool, dry place. Keep out of reach of children and animals. Your pet may consider this a treat. In case of accidental overdose, contact a health professional immediately. L-Lysine for cats is safe for kittens and senior cats. It's the perfect supplement for multi-cat households and boarding. Delivered in a delicious chicken liver flavored chew your cat will love RECOMMENDED TO SUPPORT : ¬• Immune system function ¬• Collagen formation ¬• Tissue integrity ¬• Antioxidant activity ¬• Antibody and lymphocyte production ABOUT THE FORMULA : L-Lysine is an amino acid that supports normal antibody, hormone and enzyme production. It also supports collagen formation and tissue integrity. L-Lysine competes with L-arginine, an amino acid that is required for the replication of upper respiration pathogens.