Evidence-Based Nutrient Recommendations
Evidence-Based Nutrient Recommendations

Soy and Breast Cancer Update

Published

We recently updated our soy research page with a 2019 dose-response meta-analysis of 23 prospective studies. It included a total of 330,826 participants and found that both soy protein and soy isoflavones had a positive impact on breast cancer mortality (1). A 10 mg/day increase in soy isoflavone intake was associated with a 9% decreased risk of breast cancer mortality, and a 5 g/day increase in soy protein intake was associated with a 12% reduction in breast cancer death (1).

References

1. Nachvak SM, Moradi S, Anjom-Shoae J, Rahmani J, Nasiri M, Maleki V, Sadeghi O. Soy, Soy Isoflavones, and Protein Intake in Relation to Mortality from All Causes, Cancers, and Cardiovascular Diseases: A Systematic Review and Dose-Response Meta-Analysis of Prospective Cohort Studies. J Acad Nutr Diet. 2019 Sep;119(9):1483-1500.e17.

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  • Our nutrient recommendations are only estimates—it’s not necessary to consume the exact amount we recommend every single day.
  • Supplements can be cut in half or combined to achieve the doses we recommend.
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  • We cannot provide personal nutrition advice for specific health conditions. If you need private counseling, here’s a list of plant-based dietitians.