I have recently researched vitamins, trying to improve my own health.
I read that Vitamin D3 and vitamin K2 works together. D3 is essential for the body to take up calcium. Then K2 is essential for transporting the calcium into the bones and teeth. So they work together for healthy bones and also to prevent calcification of the blood vessels among other things. It also helps things like arthritis etc. Very cool.
You can find K2 in cheese like Gouda and Brie. If I would take supplements I would take some combination of K2 and D3 but I also prefer to get things naturally just like you said :)
I am definitely not an expert but I can encourage everyone to research it for themselves.