Pet Honestys Immune Health Lysine for Cats is vet recommended to promote a strong immune system help with seasonal allergies and support eye and respiratory health This tasty meal topping powder is a natural source of omega 3s which support a strong immune system promote skin and eye health and fight allergy symptoms such as congestion sneezing wheezing itching and eye and nose discharge Other powerful natural ingredients like Lysine an essential amino acid and Quercetin a natural antioxidant help develop antibodies and build a strong immune system to keep your cat happy and healthy