Palacios C et al found that subjects with a median of 1180 mg per day of calcium whether from dietary calcium intake or calcium from supplements as opposed to a median of 1036 mg per day had less colorectal neoplasia. (16)
Excess calcium intake and cancer:
Excess calcium intake and the risk of prostate cancer: Rodriguez C et al evaluated a cohort of over 65,000 men in the United States over a period of 6-7 years revealed that intake of calcium over 2000 mg per day in the form of dietary and supplement intake was associated with a moderate increase in risk of prostate cancer. The risk of prostate cancer was not increased with diary intake. There was also no increase in risk of prostate cancer with moderate or low levels of dietary calcium intake. (17)