@joycecates - I am taking the NOW brand. It includes phosphorus. The 500 mg (2-caps) allows me to stagger the time & amount of 250 throughout the day. I'm always doing supplement research, but at the moment this seems to be a good combo for bone health.

I do plan to use one of the recommended free apps to track calcium, (but haven't done so yet) as a better way to estimate how many calcium supplements are needed.