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Light to moderate intake of alcohol, drinking patterns, and risk of cancer: results from two prospective US cohort studies

BMJ 2015; 351 doi: https://doi.org/10.1136/bmj.h4238 (Published 18 August 2015) Cite this as: BMJ 2015;351:h4238

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Re: Light to moderate intake of alcohol, drinking patterns, and risk of cancer: results from two prospective US cohort studies

It is my hypothesis of 1994 that increased testosterone increases breast cancer, as well as other cancers, (International Journal of Cancer 2005; 115: 497). This also explains why breast cancer is increasing; it is my hypothesis that women of higher testosterone are increasing in percentage within the population with time.

Consumption of alcohol by women increases testosterone levels.

I suggest the findings of Cao, et al., may be explained by increased testosterone in women caused by alcohol consumption.

Competing interests: No competing interests

22 August 2015
James M Howard
Biologist
independent
1037 North Woolsey Avenue, Fayetteville, Arkansas, U.S.A.