The animal form of vitamin K produced by bacteria in the large intestine is

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Vitamin K is produced by bacteria in the large intestine. The animal form of vitamin K is primarily phylloquinone (K1), found in green leafy vegetables, but also menaquinone (K2), produced by bacteria in the large intestine. Prothrombin and osteocalcin are proteins that require vitamin K for their activation, but they are not forms of vitamin K themselves.

The Animal Form of Vitamin K Produced by Bacteria in the Large