I'm mostly done with this thread. but wanted to suggest if you are really concerned about if you are getting the benefits of vit K2 You could ask about getting tested for The concentration of the circulating biochemical markers matrix-Gla protein and osteocalcin in their active form (carboxylated form) and their inactive form (undercarboxylated form). to see if a "normal" amount is being carboxylated which is the step that depends on Vitamin K K2. At least you could probably find out if this is something you should be concerned about or is being effected.
I dont know if these are tests most labs do. but if you are really interested, you could check out the various trials going or or just completed at the gov site with Vitamen K, bones, calcification, Coumadin ect , even if you didn't qualify for any, its a good place to see what they are working on and what tests can be done etc. plus they all have names and contact info for the doctors running them..they might be able to point you in the right direction at least. I know Walter Reed has been doing some work Coumadin and calcification for example
heres the link to the gov site
http://clinicaltrials.gov/ct2/results?term=coumadin when I did a search for just coumadin, not vit K