I am 76 with severe osteoporosis. For several months, I've been taking Vitamin K in high doses: 180mcg of vitamin K2 MK-7 (Menaquinone-7) TrueVantage brand and 45,000 mcg (45 mg) of vitamin K2 MK-4 (Menaquinone-4) Life Extension K2 High Potency brand. These high doses are discussed more in a topic in this support group titled: Vitamin K: High Doses of MK-4 and MK-7 Show Promising Results.

I don't know if they are helping since I've only been taking them a few months. I don't think they can improve my BMD, but just hope they can help me maintain what I have now.