This unique formulation with Calcium Fructoborate and Vitamins D & K2, is clinically proven to deliver better joint comfort in as little as seven days! In addition to being clinically proven to deliver joint comfort in just one tiny pill per day, it also helps bind calcium to bones to support healthy bones and supports calcium absorption to help maintain strong bones. What is Vitamin D? Getting enough Vitamin D from food alone can be difficult. Vitamin D supports calcium absorption and is essential for the maintenance of healthy bone mineralization. Each serving offers 20 mcg of Vitamin D, or 100% of the recommended daily value. What is Vitamin K2? This is one of the most clinically studied forms of Vitamin K. Vitamin K2, as MK-7, has higher bioavailability and plays an important role in supporting strong bone mass and structure. Each serving offers 180 mcg of Vitamin K2. What is Calcium Fructoborate? Calcium Fructoborate is a unique and clinically proven mineral complex (originally discovered in plants) that helps support joint health. Calcium Fructoborate is also thought to help support healthy Vitamin D levels, which are needed to help the body absorb calcium. Each dose offers 216 mg of Calcium Fructoborate. Contains: Calcium; Calcium Fructoborate; Vitamin D; Vitamin K2; Description: 30 Ultra Bone Strength Support Tablet.