Nutrabio - D3 + K2Vitamin D3 Vitamin D is an essential fat soluble vitamin and hormone precursor that is critical for numerous aspects of your health, including its most well known role in supporting bone growth and bone remodeling. * The "sunshine vitamin" also is needed for calcium absorption in the gut and maintains adequate serum calcium and phosphate concentrations to support normal bone mineralization. * Vitamin K2 Our D3 K2 supplement contains the premium,