Bio-DK Caps supplies 125 mcg (5,000 IU) of vitamin D3, 550 mcg of vitamin K (as K1 phytonadione and K2 menaquinone-7) as a micro-emulsion for enhanced absorption and utilization, which is particularly important for those with malabsorption conditions. In addition to emulsified forms of vitamins D and K, Bio-DK Caps™ contains superoxide dismutase (SOD) and catalase. SOD is an enzyme that aids in cell repair and provides antioxidant protection against cellular damage from free radicals and environmental toxins. Catalase in an enzyme that converts hydrogen peroxide into oxygen and water, also showing strong antioxidant properties.