Determining what works is part of the problem. It's why I do as much home monitoring as I can, sort of as a hobby. This morning I had a bone density scan I'm only allowed to have every 2 years. That's a long time to wait to find out whether what I have been doing to protect my bones is working, and I actually tried a few different things during that time. Lately I've learned that high levels of dietary Vitamin C might be much more important for bone health than calcium intake. It will only be a couple more years before I know if that might have been true for me. I find out in a couple days whether I have that flexibility, because I refuse to take any of the prescription meds to avoid osteoporosis.