@daisy17 Thanks for the info. During my visit with my endocrinologist he looked up the ingredients for New Chapter calcium and said to choose something else without strontium. Advertisers may not be a safe source for info on their own products. I know a few years ago a big part of Algae Cal's advertising campaign was "guaranteed to improve Dexa scan scores" or something to that effect. The way they're able to make that claim is because due to the strontium (added or naturally occurring) the scans can show a change in bone density but it's not because the bones are actually any stronger. There are other plant based, even algae specific calcium supplements that don't have strontium. It's up to us to be diligent with research on what goes into our bodies as both Big Pharma and the natural supplement industry are about profits.