Too little iron leads to anemia and too much iron increases the oxidative stress of body tissues leading to inflammation, cell death, and system organ dysfunction, including cancer.

太少铁会导致贫血，太多铁会增加身体组织的氧化应激反应导致发炎、细胞死亡和制度、器官功能障碍，也包括癌症。

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Vitamin D also appears to play a role in healthy immune function and reducing inflammation, a risk factor for numerous diseases including cancer, heart disease and diabetes.

CNN: How much vitamin D should someone over 55 take?