Vitamin K (Phylloquinone) — answers to Vitamin K1
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Phylloquinone is the plant-derived form of vitamin K, the form most concentrated in leafy greens and plant oils. It is a fat-soluble vitamin the body needs for a specific set of proteins.
Why it’s used
Taken to support normal blood clotting and, in some research, bone-related proteins.
What the evidence is for
supporting normal blood clotting.
What the evidence says
Per NIH ODS, vitamin K's role in activating clotting factors is well established, and frank deficiency causes abnormal bleeding. Evidence for effects on bone density or cardiovascular outcomes beyond basic clotting function is less settled.
Dose studied
90–120 mcg — Adequate Intake for adults, per NIH ODS.
Context
NIH ODS sets an Adequate Intake rather than an RDA for vitamin K, reflecting less certainty about exact requirements than for some other vitamins.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.