Doctor Formulated Supports Proper Joint and Connective Tissue Functions and Comfort Perna Mussel & Glucosamine MSM A Dietary Supplement Made with Non-GMO Ingredients'Sea Mussel PlusPerna mussel contain naturally occurring essential fatty acids, amino acids, polypeptides, chelated minerals, numerous enzymes, vitamins, nucleic acids (RNA and DNA), as well as glycosaminoglycans (GAGS). Supports the health, comfort, flexibility and hydration of synovial fluid and connective tissues including joints, ligaments, tendons, cartilage and intervertebral discs.