No bone mass impact from Vitamin K supplements
Adding vitamin K supplements to combined calcium and vitamin D has no effect on bone mass say US researchers.
Bone health was studied in 452 men and women aged between 60 and 80 randomly assigned to receive combined 600 mg calcium and 400 IU vitamin D, plus either vitamin K 500 micrograms daily or a multivitamin tablet. Femoral neck, spine, and total body bone mineral density (BMD) were assessed every three months for three years.
Total body BMD was similar in individuals taking vitamin K and multivitamin supplements, at 1.274 and 1.271 g/cm2. Femoral neck and lumbar spine BMDs were also similar in the two groups.
Journal of Clinical Endocrinology and Metabolism published online 10 February