Vitamin K 1

A family of phylloquinones that contains a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Members of this group of vitamin K 1 have only one double bond on the proximal isoprene unit. Rich sources of vitamin K 1 include green plants, algae, and photosynthetic bacteria. Vitamin K1 has antihemorrhagic and prothrombogenic activity. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.

Yes. Vitamin K 1 is also referred to as Phytonadione, Phylloquinone, Phytomenadione, Vitamin K1 in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.

Vitamin K 1 falls under the broader medical category "Chemicals and Drugs" in the MeSH hierarchy (tree numbers: D02.455.426.559.847.638.721.374.689, D02.455.849.291.523.500.689, D02.806.550.625). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.

For a plain-language explanation of Vitamin K 1 - including symptoms, treatments and what it means for an Indian patient - ask GoDavaii's Health AI. It works in 22+ Indian languages, is free and needs no signup. Tap "Ask GoDavaii AI about Vitamin K 1" above.