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Park Y, Mitrou PN, Kipnis V, Hollenbeck A, Schatzkin A, Leitzmann MF. The Cancer Project News, Winter 2008
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The National Institutes of Health (NIH)-AARP Diet and Health Study is the largest ongoing study in the world examining the relationship between diet and health. In 1995, study researchers assessed dairy and calcium intake in a group of volunteers. After six years of follow-up, a total of 10,180 prostate cancer cases were identified. Skim milk intake was associated with an increased risk of advanced prostate cancer. Calcium supplementation intake was also positively associated with advanced prostate cancer; however, the results were not significant. In contrast, calcium intake from plant foods was shown to have a potential protective effect against non-advanced prostate cancer. Common plant sources of calcium include green leafy vegetables, beans, sesame seeds, and tofu.