For a long time “medical science” warned people to avoid sunlight. That thinking is changing.
“If sunlight were really that bad for us, we’d be nocturnal creatures like mice,” says Dr. Francis Gasparro, adjunct research professor of Dermatology at Thomas Jefferson University in Philadelphia.
“Probably 40 percent of otherwise healthy adults between 49 and 65 years old and half of all people over 65 are deficient,” says Michael Holick, who runs the Vitamin D, Skin and Bone Research Laboratory at Boston University Medical Center.
"Only 20 minutes of sunscreen-free exposure several times a week makes plenty of Vitamin D."