Puur L-Lysine is a food supplement for cats and dogs with reduced resistance. L-Lysine is an amino acid, which is important for the production of elementary bodily proteins. In addition, it promotes growth and supports the tissue thanks to its collagen-forming qualities and its ability to absorb calcium. The added Vitamin B6 supports a healthy immune system. In addition, Vitamin B6 supports the body's ability to absorb L-Lysine.