via https://t.co/dCZvREV3Di “kennak: “ビタミンDの合成に紫外線が必要というのは栄養状態が悪かった戦後すぐの話で、現在はわざわざ日に当たらなくても十分、食品からビタミンDはとれるので、むしろ日焼けはできるかぎり避けたほうが…” https://t.co/iYQ8Riua6M



from Twitter https://twitter.com/itarunozaki

August 21, 2020 at 04:32AM
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