Give your kitty the important nutrients she needs with NOW Pets L-Lysine Immune System Support Cat Supplement. This easy-to-feed powder provides L-Lysine to help support a healthy immune system, and normal respiratory health and also helps to maintain ocular health. Plus, it’s great for multiple-cat households to keep your cats feeling hearty. Recommended by the founder of The Royal Treatment Veterinarian Center, Dr. Barbara Royal, DVM, CVA, this powder is designed with your feline friend in mind.