Deep Relief Actiflex Patch contains Green Lipped Mussel extract and Hyaluronic Acid. The Green Lipped Mussel extract is a source of Omega-3 fatty acids. Hyaluronic Acid (HA) is produced naturally in the body and is a key component of skin, connective tissue and the synovial fluid around joints, where it helps to moisturise, cushion, lubricate and restore elasticity.