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补充剂真的能增强免疫系统吗?
有数千种宣称有助于免疫系统的补充剂。有些只含有一种维生素或矿物质,而有些则含有多种成分的大杂烩。专家说,维生素D、维生素C和锌是研究最多且最常见的成分,但其益处仍不确切。
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