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Dark Winter Days Mean You Should Think More About Vitamin D

Orange juice is often fortified with vitamin D. It’s a good option when you can’t lay out in the sun.

Orange juice is often fortified with vitamin D. It’s a good option when you can’t lay out in the sun.

Photographer: Tiffany Hagler-Geard/Bloomberg

Happy Thanksgiving! It’s Ike in Boston, where sunlight is sparse, curtailing the supply of an important nutrient. More on that later, but first...

A little while ago, I was at a dinner party with friends and we were reflecting on how the days are getting shorter and shorter as winter approaches. The talk turned to vitamin D and how it comes from the sun, sort of.