Amazon Is there a smarter way to take your supplements? According to some research, there could be one strategy for maximizing benefits. A review published in the International Journal of Endocrinology highlights a synergistic interplay between Vitamins D and K for both bone and cardiovascular health. “Vitamins D and K are both fat-soluble vitamins and play a central role in calcium metabolism,” the review explained. “Vitamin D promotes the production of vitamin K-dependent proteins, which require vitamin K for carboxylation in order to function properly.” In short, Vitamin D3 helps your body absorb calcium, while K2 helps guide it into the bones. And some specialized formulas offer both vitamins packed in one simple capsule to support absorption. Sports Research D3 + K2 is among them — a