I was just diagnosed with mets to the bone and liver in Jan. 2003 from a breast cancer originally diagnosed in 2000. I started taking Coral Calcium two weeks ago and I have so much more energy and am sleeping better as well. I haven't had any rechecks on my labs or scans yet, so I can't tell you on that but just to sleep better and have more energy means a lot to me. I did check with my oncologist, who knew nothing about coral calcium, but he did tell me that it would NOT hurt me.