Three compounds have the biological activity of vitamin K (Figure 8.6):
● phylloquinone, the normal dietary source, found in green leafy vegetables;
● menaquinones, a family of related compounds syn-thesized by intestinal bacteria, with differing lengths of the side-chain;
● menadiol and menadiol diacetate, synthetic com-pounds that can be metabolized to phylloquinone.
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