Most people already know the main benefits of Vitamin D: strong bones and teeth healthy muscle function and immune support. But many don?t know that Vitamin D-3 needs Vitamin K-2 for maximum benefit. That?s why our powerful formula combines D-3 cholecalciferol with K-2 as MK-7 or menaquinone-7. While Vitamin D-3 helps the bones absorb calcium K-2 may help direct the calcium to the bones and away from arteries and joints. The same biologically active form of Vitamin D synthesized through sun exposure Vitamin D-3 may also help support healthy immune system function and a healthy heart. Like all KAL products our D3 K2 ActivMelt is lab verified for the purity and potency of its ingredients. Confidence in the KAL name is just one of the reasons we?ve been around so long and maintain our place as a leader in the industry. Unlike many other companies we manufacture almost all our own products in our GMP-certified facility in Utah. This gives us the ability to thoroughly test and screen raw ingredients f