What are the primary forms of vitamin K, and where are they found?

Label:chem

Topic
Vitamin K is a group of fat-soluble molecules essential for activating vitamin K-dependent proteins (VKDPs).
Answer
The primary forms are phylloquinone (vitamin K1), found in green leafy vegetables, and menaquinones (MKs, vitamin K2), found in fermented foods and animal-based products like dairy. MKs include subtypes MK4-MK13, with MK-7 having a longer half-life (3 days) compared to K1 (1–2 hours).
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