vitamin K1 vs vitamin K

vitamin K1 and vitamin K both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitamin K1	Yes	No	No	No
vitamin K	Yes	No	No	No

As nouns, vitamin K is a hypernym of vitamin K1; that is, vitamin K is a word with a broader meaning than vitamin K1:

vitamin K1: a form of vitamin K, based on 2-methyl-1,4-naphthoquinone, with a 3-phytyl substituent
vitamin K: a fat-soluble vitamin that helps in the clotting of blood

Other hypernyms of vitamin K1 include antihemorrhagic factor, naphthoquinone.

vitamin K1 (noun)	vitamin K (noun)
a form of vitamin K, based on 2-methyl-1,4-naphthoquinone, with a 3-phytyl substituent	a fat-soluble vitamin that helps in the clotting of blood