Joint Aid combines Glucosamine, Chondroitin, MSM & Hyaluronic Acid with wild Antarctic krill oil to support digestive absorption. The result is a unique joint product that can be more readily absorbed by your dog to help maintain the health of hips, joints, cartilage, collagen, and other cell structures of the body that are responsible for movement. Wild krills naturally occurring phospholipids help create a healthy cell membrane lipid bilayer, which assists in the transfer of molecules and ions into and out of cells. This encourages better absorption of the joint ingredients, as well as all the nutrients in your dogs diet. Grain-Free & Gluten-Free formula! Made in the USA! 32 oz.