What If Avoiding the Sun Is Bad for You?
The pros and cons of sun exposure don’t start and end with vitamin D and skin cancer
It was around 15 years ago that Dr. Matt Zirwas, an Ohio-based dermatologist, first noticed something curious about the people he was treating at his clinic.
“The older patients I was seeing [who had] lots of sun damage and lots of skin cancer would be very robust, very energetic people,” he says. These were people who, apart from their skin cancers, tended to be in excellent health and taking very few prescription drugs.
“But then I’d see these people who had beautiful skin and no cancers, and they were very low-energy and taking medications for all these different health problems,” he recalls. He began to wonder whether exposure to ultraviolet (UV) light, mostly from the sun, had more health benefits than he and other experts realized.
When most people consider UV light and its effects, skin cancer and premature aging come to mind. And there’s no question that exposure to the sun, tanning beds, and other sources of UV light damages the skin in ways that promote aging and cancer. That’s why most dermatologists and public health officials recommend that Americans slather sunscreen on exposed skin whenever they leave the house — even in the wintertime — or take…
