Vitamin K1 and Vitamin K2 were long considered to be two largely identical forms of the same vitamin. Today, it is known that the function and metabolism of these two K vitamins differ significantly and that they are found in different foods. While Vitamin K1 is found in green vegetables and leafy greens, Vitamin K2 is present in meat, dairy products, and fermented foods. Vitamin K2 plays a crucial role in calcium metabolism, as it helps ensure that calcium from our blood reaches the right places in the body, strengthening bones and teeth instead of being deposited in soft tissues and calcifying arteries. It is thus the most effective protection against osteoporosis, arteriosclerosis, Alzheimer's disease, and coronary heart disease. This guide explains how to meet your Vitamin K2 needs through natural nutrition.