if it just says "Vitamin K", it'll be vitamin K - either K1 or K2.
Vitamin K is a primary vitamin important for clotting - it's the first response against rat poisoning.
what you're thinking of about vitK being toxic is a substance called "menadione", which isn't actually vitamin K. it'll be listed as "menadione sodium bisulfate", "menadione sodium bisulfite", "menadione dimethylprimidinol sulfate", "menadione dimethylprimidinol sulfite", or "menadione dimethylpyrimidinol bisulfite". sometimes they'll leave off the "menadione" and just put, ie, "sodium bisulfate". in parantheses after, it'll say "vitamin K" or "a source of vitamin K activity" or some such blithering vagary.