The body absorbs the minerals found in bone broth very easily (even more so then from supplements) and it's a great source of dairy free calcium. (ohbabynutrition.com)
It's also a dairy - free calcium alternative for those following a strict paleo diet. (ourpaleolife.com)
So my approach to making sure I wasn't going to harm myself with free calcium was to make sure that I had adequate vitamin D and vitamin K2. (blog.bulletproof.com)