Extend Joint Care For Dogs - 1 Month Supply. Pure Grade Ingredients - 100% Money Back Guarantee Advanced joint Support Formula Methylsulfonylmethane: Supports proper maintenance connective tissue function and joint comfort Glucosamine: Supports hydration, mobility and comfort Ascorbic Acid: Increases the production of collagen and glycosminoglycans like chondroitin sulfates and hyaluronic acid Type II Chicken Collagen: Essential building block for maintaining healthy articular cartilage