I don\'t if it causes cancer or not My daughter had breast cancer 2005 and she took actanol 2 times and bivina once and she was in good health before hand and the dr said she need to take this bone builder and after bovina all heck broke loose her jaw had sharp pains and was numb. and her gums are black and blue. been to dentist, oral surg., energ rooms when she ha d gone to the drs and mri\'s ,about 10 test at different times and they said she had cancer again. TWhen the asked about bovina he said are you stll taking it HE SAID DON\'T TAKE ANYMORE Then they done Bio\'s and He said Bovina was good for cancer We didn\'t understand what he was talking but we are going to ask him on next visit sure would like to know but I would nearly bet my life it does.......