A study reported at the World Congress on Osteoarthritis looked at 1200 patients without arthritis at baseline followed for 30 months. Those who developed osteoarthritis in both knees had a twofold incidence of vitamin K deficiency. Those who developed osteoarthritis in only one knee had a threefold incidence in vitamin K deficiency. There is no study yet that determines that taking vitamin K prevents osteoarthritis, but it might be a prudent thing to do, especially if you are at risk. Vitamin K can be measured with a simple blood test. Deficiency in vitamin K has also been linked to osteoporosis.
See Family Practice News (click here), November 15, 2010, p. 65. Dr. Tuhina Neogi(click here) from Boston University and the MOST study (click here).