Calcium Absorption Support: ADK is a powerful dietary supplement designed to support bone structure and density; Vitamins A, K2, and D3 work together to support calcium transportation and calcium absorption* | Heart Health Supplements: ADK is also a heart health supplement, providing circulatory support to support your optimal heart functioning* | Bone Strength Supplements: With 1,500 mcg of Vitamin A in each serving, ADK supports calcium absorption and supports strong bones and teeth, making it a superior choice in bone strength supplements* | Vitamin K Presence: Our gluten-free formula includes Vitamin K2, a unique form that activates the benefits of vitamins D and A, while supporting circulatory function* | About DaVinci: Since 1973, we have been a leader in nutritional research, product development and innovation with our emphasis on quality