Vitamin K1, also known as phylloquinone, phytomenadione, or phytonadione, is a polycyclic aromatic ketone, based on 2-methyl-1, 4-naphthoquinone, with a 3-phytyl substituent. It is a fat-soluble vitamin that is stable to air and moisture but decomposes in sunlight. It is found naturally in a wide variety of green plants, particularly leaves, since it functions as an electron acceptor during photosynthesis, forming part of the electron transport chain of Photosystem I.The best dietary sources ... Read more
