Perfect K2D3Vitamins K2 and D3 regulates calcium metabolism a process that supports the movement of calcium into your gut and out of your gut. Both vitamins are necessary to prevent your soft tissue from calcifying, and help deliver calcium to the all right places in your body. Most people are deficient in vitamins K2 and D3. K2 and D3 are not easily bioavailable in the foods we eat. Thats why its important that you supplement the two vitamins for optimal health.