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https://longliverblog.com/2018/04/05/%d1%83%d0%b7%d0%bd%d0%b0%d0%b5%d0%bc-%d0%b4%d0%bb%d1%8f-%d1%87%d0%b5%d0%b3%d0%be-%d0%bd%d1%83%d0%b6%d0%b5%d0%bd-%d0%b2%d0%b8%d1%82%d0%b0%d0%bc%d0%b8%d0%bd-d/
Узнаем, для чего нужен витамин D