ADGICAL K27 Softgel Capsule is a combination of Calcitriol, Calcium Carbonate, and Vitamin K2- 7. Calcitriol is the active form of Vitamin D. It raises Vitamin D levels in your blood. This in turn raises calcium levels in your blood by helping you absorb more calcium from your intestine. Calcium carbonate is a dietary supplement used when the amount of calcium taken in the diet is not enough. Vitamin K2-7 plays a central role in the metabolism of calcium, the main mineral found in your bones and teeth. Vitamin K2-7 activates the calcium-binding actions of two proteins : matrix GLA protein and osteocalcin, which help to build and maintain bone health.is a combination of Calcitriol, Calcium Carbonate, and Vitamin K2-7. Calcitriol is the active form of Vitamin D. It raises Vitamin D levels in your blood. This in turn raises calcium levels in your blood by helping you absorb more calcium from your intestine. Calcium carbonate is a dietary supplement used when the amount of calcium taken in the diet is not enough. Vitamin K2-7 plays a central role in the metabolism of calcium, the main mineral found in your bones and teeth. Vitamin K2-7 activates the calcium-binding actions of two proteins : matrix GLA protein and osteocalcin, which help to build and maintain bone health.