SFA, I have wondered the same things as you are saying. I’ve looked for information on calcitonin and osteoporosis for several years and have only found information similar to that Bobbi shared. Still, like you, I think more research might uncover new information. Standard practice in medicine MUST be continually challenged or no gains would be made. I’m not a doctor, but I don’t think the body makes hormones it doesn’t need–not T3 or calcitonin.