Jini Says: These atom-sized/angstrom/nano-sized minerals have the best absorption of any mineral form, because they do not require digestion. They can be absorbed simply by holding in your mouth (absorption through the mucosal tissue). Thus, the atom-sized magnesium will not cause diarrhea. And the atom-sized (nano) iron will not trigger intestinal bleeding or constipation. If you've been on steroids for any length of time, or are concerned about Osteoporosis, then supplement with these targeted minerals to rebuild and strengthen your bones. It's also good for people in disease states to ingest extra minerals to help alkalize the overall body pH. My whole family has been using these minerals since 2008. They are safe, effective, and the Bone Matrix is a vital part of us avoiding tooth decay!