Chemicals and Drugs

Vitamin K

A lipid cofactor that is required for normal blood clotting. Several forms of vitamin K have been identified: VITAMIN K 1 (phytomenadione) derived from plants, VITAMIN K 2 (menaquinone) from bacteria, and synthetic naphthoquinone provitamins, VITAMIN K 3 (menadione). Vitamin K 3 provitamins, after being alkylated in vivo, exhibit the antifibrinolytic activity of vitamin K. Green leafy vegetables, liver, cheese, butter, and egg yolk are good sources of vitamin K.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A lipid cofactor that is required for normal blood clotting. Several forms of vitamin K have been identified: VITAMIN K 1 (phytomenadione) derived from plants, VITAMIN K 2 (menaquinone) from bacteria, and synthetic naphthoquinone provitamins, VITAMIN K 3 (menadione). Vitamin K 3 provitamins, after being alkylated in vivo, exhibit the antifibrinolytic activity of vitamin K. Green leafy vegetables, liver, cheese, butter, and egg yolk are good sources of vitamin K.

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Aspects Covered

28 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

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Indexing Annotation

/ther use: coordinate disease with /drug ther, not /diet ther

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References

  1. National Library of Medicine. Vitamin K. Medical Subject Headings (MeSH). 2026. Unique ID D014812. http://id.nlm.nih.gov/mesh/2026/D014812
  2. Vitamin K. In: Wikipedia. https://en.wikipedia.org/wiki/Vitamin_K
  3. Vitamin K. In: Wikidata. https://www.wikidata.org/wiki/Q182338