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Vitamin - Wikipedia, the free encyclopedia
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日期:2026-04-19
A vitamin (US /ˈvaɪtəmɪn/ and UK /ˈvɪtəmɪn/) is an organic compound and a vital nutrient that an organism requires in limited amounts.[1] An organic chemical compound (or related set of compounds) is called a vitamin when the organism cannot synthesize th...看更多
















