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# Circumcision cuts risk of prostate cancer in Black men
- URL: https://www.foodconsumer.org/circumcision_prostate_cancer_in_black_men_0710141202/
- Published: 2014-07-11T01:01:00.000Z
- Updated: 2026-09-22T16:24:28.000Z
- Description: In a Montreal case-control study of 1,590 men with prostate cancer and 1,618 controls, circumcised men were 11% less likely to have the disease, a difference the authors call insignificant. Men circumcised at 36 or older were 45% less likely, and Black men 60%. Causation was not shown.
- Author: Food Consumer
- Tags: Lifestyle, Health News, #vivvo-import

Thursday July 10, 2014 (foodconsumer.org) -- A new study in BJU International suggests that circumcision may help prevent prostate cancer, particularly in Black men, although the study could not provide a reason to explain why circumcision can lower the risk of the disease.

The study was based on data from 1,590 men with pathologically confirmed prostate cancer diagnosed in a Montréal French hospital between 2005 and 2009, and 1,618 controls without the disease.

The study shows that circumcised men were 11% less likely to develop prostate cancer than uncircumcised men, but the difference between the two groups was insignificant.

However, those circumcised men aged 36 years or older were 45% less likely to be diagnosed with prostate cancer, compared with those who were uncircumcised, and the risk reduction was statistically significant. 

And circumcision within one year of birth was also associated with slightly reduced risk of prostate cancer.

The strongest protective effect of circumcision was found in Black men. In Black men, circumcision was associated with 60% reduced risk of prostate cancer and the risk reduction was not found in other ethnic ancestral groups.

All the associations between circumcision and risk of prostate cancer were adjusted for age, ancestry, family history of prostate cancer, cancer screening history, education and history of sexually transmitted diseases.

The study concluded men circumcised particularly aged 36 years or older were much less likely to develop prostate cancer, compared with those uncircumcised and the protection was mainly found in Black men, who have the highest rate of the disease.

It should be noted that results from the study may not be applicable to other populations in other countries and the study per se does not imply that circumcision is the cause for the reduction in risk of prostate cancer in Black men. In other words, the associations could be work of chance. (David Liu, PHD)

Andrea R. Spence, Marie-Claude Rousseau, Pierre I. Karakiewicz andMarie-Élise Parent, Circumcision and prostate cancer: a population-based case-control study in Montréal, Canada, BJU International, 2014