Vitamin K is a afat soluble vitamin found in two main forms. Both are used to attach calcium to certain proteins, to make them functional.
Phylloquinone or K1 is found primarily in leafy greens. It is used mostly for blood clotting.
Menaquinone or K2 is found mostly in animal foods and ferments. It is used mostly for healthy bones and teeth.
Vitamin K is also used to control glutamate receptors.
Reasons to Suspect
Cavities, nosebleeds, easy bruising, osteoporosis, atherosclerosis
K1: Leafy greens, brussels sprouts, broccoli, asparagus
K2: Yellow grassfed butter, pastured eggs, fish roe, natto