Joint Rejuv supports healthy joint function, helps minimize joint pain, rebuilds cartilage and maintains structural integrity of joints. After a few weeks to a month on Joint Rejuv, your pet should display noticeable improvement in comfort, mobility and attitude. Active iIngredients: Glucosamine HCl, Bromelain, Yucca Schidigera, Chondroitin Sulfate (shark cartilage), Collagen complex, Manganese, Citrus bioflavonoids, Copper, Zinc, and Selenium. Not recommended for pregnant and lactating females, pets with allergies to shellfish or diabetic pets.