Diet or Antibiotics
The vast majority of our vitamin k is actually produced by symbiotic bacteria
in our intestines.
So, if one has recently had a bout of heavy antibiotic
use (which kills off both "good and "bad" bacteria in the body), then vitamin k deficiency
can result. Poor diet
can also lead to this deficiency. A deficiency in vit. K most often results in easy bleeding/hemorrhage
Answer assisted by David Escobar, Medical Student