Thanks, @windyshores. Mine was an older post and I've read what you've since posted about the strontium question and haven't added any to my regime. I'm staying with the trifrcta of calcium/D3/K2 and working on better diet. I read a study questioning whether osteoporosis is really understood as it looked at patients with multiple compression fractures but good DEXA scores and those with poor DEXA scores but yet oddly strong bones with no fracture history. Therefore suggesting, as structural engineers might, that the science needs to relook at bone attributes and inherent strength. The analogy was to the many variables that can make cement, or steel, hard or dense, but weak, versus lighter, less dense material that can absorb and transmit shock or load without damage (e.g., bamboo). For Mr, I'm staying with the trifecta of calcium/D3/K2 and hoping that organically-grown fruits and vegetables I've increased in diet will absorb the trace minerals we need.