♨실내에서 비타민d를 합성할 수 있다? 없다?♨
Synopsis
실내에서 비타민D를 합성할 수 있다? 없다?
![걷기와 햇빛. 비타민D 충격적인 결과! 골다공증을 예방하려면 꼭 보셔야 합니다!! [털털한 의학나라]](https://i.ytimg.com/vi/QcPDuqgESIo/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLBhfhjZnRctS8IJ0JdJUIKyQiFIRA)
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