180 The real reason they tell you to avoid the Sun. (twitter.com) 🧘Mental/Physical Health 🏋🏼♂️ posted 313 days ago by Joys1Daughter 313 days ago by Joys1Daughter +180 / -0 84 comments share 84 comments share save hide report block hide replies
How does squinting from bright sun increase d production? D comes from the Sun, which gets filtered out as it enters your car through glass.
D is produced by the body.