Healthy bones need a variety of nutrients to preserve adequate mineral mass, maintain strong supporting structures, and promote repair functions.Formulated with chelated calcium and magnesium for optimal absorption. Vitamin D is included for the body to utilize calcium and phosphorus and for properly building strong bones and teeth. Vitamin K is important for production of osteocalcin. Manganese is needed for bone mineralization and connective tissue synthesis. Studies also show zinc, strontium, vitamin B6, vitamin C, silicon, copper, and boron also help form the connective structures in bone.