I officially have osteoporosis. I knew it was nasty - very slow, but nasty. I'm finding it is even nastier than I thought. Most of the things I can do are listed somewhere else as things not to do... hopefully, that isn't as much so as it looks after one day of poking at it with new eyes. My mom ended up with bones less dense than her lungs and she did more of most things that can be done than I can possibly do (weight-bearing exercise, not smoking, not super skinny or fat, calcium intake, etc). I soooo don't want to deal with this. Best I can tell, I'm at the very least ten or twenty years ahead of (as in progressed this far earlier than) the typical person who has it.
Please get enough vitamin D. That is the one thing that has no opposing cautions - of the things I can do anyway.
Most of Americans are deficient in Vit D; Michigan's overcast skies make it even more likely to not get enough.