BackPack packets contain a unique combination of nutrients designed to maintain healthy joints. Glucosamine sulfate supports normal cartilage lubrication maintaining its structure and function. Gamma Linolenic Acid (GLA, Omega-6) is a precursor for prostaglandins-- important compounds linked to muscle contraction and the regulation of normal healthy inflammatory response. Studies show Omega 3s support normal flexibility and joint comfort. A powerful antioxidant, Vitamin E has also been shown to support joint comfort.