Duraflex is a highly palatable joint health supplement for dogs, in the form of a soft-chew treat. Designed to enhance mobility and overall joint function. Give one soft chew daily at feeding time for each 40-50lb ofbody weight. INGREDIENTS: Glucosamine HCl 500mg, Chondroitin Sulfate 500mg, MSM 500mg (meythylsulfonylmethane), Precipitated Calcium Carbonate 40mg, Manganese Sulfate 10mg, Hyaluronic Acid 5mg, Vitamin E 50iu, Selenium 10mcg.