Vitamin K is an essential supplement that your body requires in order to be able to clot blood effectively; a deficiency in vitamin K can actually lead to excessive bleeding, nosebleeds as well as extensive bruising. If this sounds familiar, then you need to check in with your physician, and get treated for the same. Half of the needed vitamin K is synthesized by the bacteria present in your intestine; you can complement this with a regular diet of leafy vegetables as well as dairy products. Vitamin K is essential for the formation of blood clots which is why it is important that you check with your doctor on displaying some or all the symptoms listed above.