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- In this observational correlative study, the authors evaluated the impact of dietary supplements during cancer treatment in 1134 patients with metastatic breast cancer queried at registration and during treatment in a randomized phase III trial of chemotherapy treatment schedules.
- The authors found a signal of potential negative impact in terms of recurrence and overall survival with the use of antioxidants, iron, and vitamin B12 during chemotherapy. Multivitamin use was not associated with survival outcomes.
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