A 4-year Italian study found that cheese consumption increased the risk of non-Hodgkin lymphoma by 66%. A separate study linked consuming 16 oz of yogurt per day to a 61% increased risk of prostate cancer. Additionally, half an ounce of milk chocolate was found to double the risk of prostate cancer, possibly due to theobromine content.

1. cancer

22. Cheese and LymphomaIn a 4 year case control study in Italy, the consumption of cheese was found to increase the risk of non-Hodgkin lymphoma by 66%. Int J Cancer. 2006 Jun 1;118(11):2871-6.

23. Yogurt, 16 oz a day, increases prostate Cancer by 61%.Br J Nutr. 2006 Mar;95(3):539-45.

31. Bitter Sweat: TheobromineOne half ounce of milk chocolate doubles the risk of prostate cancer.Cancer Causes Control 1993 Nov;4(6): 559-563.