I´m still looking for an article, but in the mean time I found others:
Simonsen, Neal, et al. Adipose tissue omega-3 and omega-6 fatty acid content and breast cancer in the EURAMIC Study. American Journal of Epidemiology, Vol. 147, No. 4, 1998, pp. 342-52: The study found no significant correlation between omega-3 fatty acid levels and breast cancer incidence, but did find a trend to increasing incidence with increasing levels of omega-6 fatty acids in the adipose tissue samples.
Franceschi, S., Favero, A., Decarli, A., Negri, E., La Vecchia, C., Ferraroni, M., Russo, A., Salvini, S., Amadori, D., Conti, E., Montella, M. and Giacosa, A. 1996. Intake of macronutrients and risk of breast cancer. Lancet. 347:1351: This study found that increasing the consumption of fat is reducing the risk to get breast cancer. [lots of investigators!]
Yale July 2, 2003: High dietary (n-3)/(n-6) fatty acid ratio lowers breast cancer risk University: New evidence supports the theory that a diet containing a high (n-3)/(n-6) fatty acid ratio lowers the risk of breast cancer in premenopausal women.
There really is a controversy about fatty acids and breast cancer, but I think avoiding animal products and raising the proportion of omega-3 fatty acids is a good idea, actually also for men to lower the risk of prostrate cancer.
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