Metformin Won’t Aid Breast Cancer Survival in Diabetics, Women’s College Hospital Study

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Despite prior research suggesting that the widely used diabetes drug metformin might help cancer patients, a new study finds it does not boost survival for older breast cancer patients with diabetes. Previous research has found that metformin was associated with an up to 30 percent reduction in new cancers in breast cancer patients without diabetes, noted study author Dr. Iliana Lega, a research fellow at Women’s College Hospital in Toronto. Prior research has also tied use of the drug to slowed tumor growth.

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