About This Item MegaQuin K2 + D3 is a high-potency K2/D3 supplement that represents a new approach to supporting bone, heart, nerve, mitochondrial, and immune function. It is a far-reaching metabolic support with this synergistic vitamin K and D supplement formulation offering a myriad of health-supportive benefits. Microbiome Labs combines highly bioactive and effective forms of natural vitamin K2 (MK-7) and vitamin D3 (cholecalciferol) in MegaQuin K2 + D3 Ingredients Vitamin D (D3 as Cholecalciferol) 125 mcg (5,000 IU), Vitamin K2 (as menaquinone-7 [MK-7, MenaquinGold]) 200 mcg. Cellulose and vegetable capsule (cellulose and water). Why We Chose This Fat-soluble vitamins D and K have a synergistic interplay in several health-supportive functions. Animal and human studies focusing on genetic, molecular, and cellular aspects suggest that optimal vitamin D and vitamin K concentrations support healthy bone and heart function. Both vitamins play a critical role in calcium metabolism. Calcium absorption, assimilation, and utilization are sophisticated processes requiring adequate amounts of vitamin D3 and vitamin K2-7. [description] Research has shown that administering vitamins D3 and K2-7 supports improved calcium absorption in the gastrointestinal system and directs calcium away from tissues into bone. Vitamin K2 supports the removal of calcium from tissues and transports it to the bone where it belongs, maintaining optimal bone health. Vitamin D3 supports and maintains intestinal calcium and phosphorous absorption for optimal bone mineral matrix formation, making vitamin D one of the most important vitamins for supporting strong, healthy bones. Vitamin D3 also plays a vital immune function-supportive role.