I started seeing an interventional medicine specialist for support to address the big picture with regard to health and nutrition goals related to osteoporosis management and one of her recommendations was switching from Vitamin D3 capsule to Orthomolecular D3/K2 drops. The K2 is primarily from MK7 which has a longer half life and better bioavailability than MK4. I get this (and other supplements she recommended) through Fullscript (us.fullscript.com) which is an online dispensary for supplements that she felt has superior quality control and sourcing and is reasonably priced ($33 for a bottle which will last several months). There are so many ways to support better bone health that are not addressed by most traditional medical specialists. I have learned about many through this forum which has prompted me to do more research and this ultimately led me to the Interventional Specialist who, so far, has been very valuable. I hope this is helpful!