Vitamin K is absolutely essential to build strong bones -- and it is proven to prevent heart disease. For several years, compelling evidence has shown that most people don't get enough vitamin K to protect their health through the foods they eat.Green leafy vegetables supply almost half of the vitamin K for the majority of Americans. Most foods considered rich in vitamin K have shown to have less vitamin K than previously thought. Despite this vital information, the majority of multi-vitamins don't contain any vitamin K at all -- and those that do don't contain enough.Recent research supporting vitamin...