Member's Mark Ultra Triple Action Joint Health* is a combination of three important nutrients that help promote joint, bone and cartilage health.* Type II Collagen (UC-II) is the same protein found in healthy cartilage. Using a patented stabilization process, the cartilage-derived type II collagen is preserved intact. Hyaluronic Acid exists naturally in your joints. Boron helps maintain healthy vitamin D, calcium and magnesium levels for healthier bones.*