Just like vitamin D, vitamin K has been getting a lot of attention recently. This vitamin signals a protein that aids in rebuilding bones. Vitamin K has even been known to protect against fractures and some cancers [source: Hedrick]. It's also an important part of maintaining vascular health because it can help prevent calcium buildup along blood vessel walls.
But while vitamin K is popular, the primary food sources of it are not -- broccoli and green leafy vegetables or fermented cheese and soy. If these options don't appeal to you, try supplementation.
You don't have to be a nutritionist to know about the next vitamin on our list.