Vitamin K is a fat-soluble nutrient your body uses for blood clotting and bone health. It comes in two main forms—K1 from leafy greens and K2 from fermented foods and animal products—and your body handles each one differently. Most people get enough K1 from their diet, but K2 is less common and harder to track. Understanding where vitamin K comes from, how much you actually need, and whether you're getting enough helps you make informed choices about your food and any supplements you're considering.
These guides cover the practical questions: which foods contain the most vitamin K, how cooking affects it, what happens if you take blood thinners like warfarin, how to read supplement labels, and whether K2 supplements are worth the cost. You'll also find information about the difference between K1 and K2, how your body absorbs and stores vitamin K, and what the research actually says about bone and heart health claims.