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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  • If you have a question about whether it's okay to cut supplements in half or combine supplements to achieve the dose we recommend, the answer is “Yes.” Be aware that nutrient recommendations are only estimates—it's not necessary to consume the exact amount we recommend every single day.
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