The A.D.K. supplement from BioTE Medical contains a patented complex that enhances bioavailability of several ingredients that are critical to bone health. The ingredients of A.D.K include vitamin A as retinyl palmitate, vitamin D3 as cholecalciferol and Vitamin K2 as menaquinone-7. The ingredients used in the BioTE A.D.K. supplement are high-grade and formulated to help you experience optimal health. For a higher dose of Vitamin D3, look to our A.D.K. 10 supplement.