Harvard School of Public Health distributed a press release on Apr. 4, 2000, "Higher Intake of Dairy Products May Be Linked to Prostate Cancer Risk," that described researchers' findings after tracking the Physicians' Health Study:

“New data from a long-term study suggest an association between consumption of higher quantities of dietary calcium and risk of prostate cancer… They [researchers] found a moderate elevation in risk of prostate cancer associated with higher intakes of dairy products and dairy calcium…

The researchers also found that men who drank more than six glasses of milk per week had lower levels of the potentially protective form of vitamin D than men who drank fewer than two glasses of milk per week.”

Apr. 4, 2000