She and her colleagues used data from 45,204 women enrolled in the Nurses' Health Study II, which began in 1989 to study oral contraceptives, diet and lifestyle risk factors among young nurses aged 25-42 years.
The NCRI data shows that an average of 2,883 cases were diagnosed each year between 2011 and 2013.
Professor Brandt said, "Our research can help to shine a light on how dietary patterns can effect our cancer risk". In that study, the authors evaluated the association between daily consumption of natural isoflavones and all-cause mortality in 6,235 Canadian and U.S. women with breast cancer.
Risk factors for breast cancer include having a family history of breast cancer, being overweight, having a late menopause, or never giving birth.
Alcohol, part of a traditional Mediterranean diet, was excluded from the study because of its links to breast cancer.
New research suggests soy products may not only be safe to eat but beneficial for women with breast cancer.
The study, in the International Journal of Cancer, was funded by the World Cancer Research Fund.
Although the research provides with positive results pertaining to consumption of soy-based products by breast cancer patients, Kathy Chapman, chair at Cancer Council Australia warned women to be cautious as the "jury is still out".
06 de marzo de 2017, 11:47Washington, March 6 (Prensa Latina) The consumption of soybean and its derivatives is associated with increased survival in many breast cancer patients, specialized sources published today.
"Based on our results, we do not see a detrimental effect of soy food intake among women who were treated with endocrine therapy", Zhang said.
It included more than 6,000 American and Canadian breast cancer patients.
In contrast to some previous research, high levels of isoflavone intake were not associated with greater mortality among women receiving hormonal therapy. Also, soy had a protective effect in those women with hormone receptor-negative tumors.
"Women who did not receive endocrine therapy as a treatment for their breast cancer had a weaker, but still statistically significant, association", she added.
The study's senior author, Esther John, Ph.D., of the Cancer Prevention Institute of California, also weighs in on the findings.
This form of the disease, which is not stimulated by the sex hormone oestrogen, is often harder to treat than hormone-sensitive cancer and more likely to prove fatal.
"Our findings suggest that survival may be better in patients with a higher consumption of isoflavones".