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VitaminWell-studiedVitamin

Vitamin K1

Half-life

~1–2 hours

What is Vitamin K1?

Plant-derived form of vitamin K. Essential for blood clotting coagulation factors.

How Vitamin K1 works

Coenzyme for carboxylation of glutamic acid residues in coagulation factors II, VII, IX, X, protein C and S — activating clotting cascade. K1 primarily supports hepatic coagulation factor production.

Benefits & uses

  • Blood clotting
  • Bone support (lesser than K2)

Common uses: Blood coagulation, bone health support (secondary to K2).

Vitamin K1 dosage

Typical dose
Dietary adequate intake 90–120 mcg/day; supplement 100–1000 mcg/day for bone support.

Vitamin K1 half-life

~1–2 hours (plasma)

Vitamin K1 side effects

Very safe. Interacts with warfarin/anticoagulants — do not alter dose without medical supervision.

  • Interacts with warfarin (blood thinner) — do not supplement without physician guidance
  • Otherwise extremely well tolerated
  • IV form may cause anaphylaxis (uncommon pharmaceutical use)
  • Well tolerated

Warnings & monitoring

  • Interacts with warfarin — keep intake consistent, consult your doctor

Track Vitamin K1 in Protokol.

Log doses, model half-lives, check interactions, and line it all up against your bloodwork. Free on iPhone and Android.

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More Vitamin

For research and educational purposes only. This page is not medical advice and is not a recommendation to use any compound. Many compounds listed are not approved for human use, and some are prescription-only or controlled in your jurisdiction. Dosing figures are reference or observational reports. Talk to a qualified healthcare provider before starting, stopping, or changing anything. Protokol is for tracking purposes only.