The independent Vitamin D Council suggests that people should use a sunbed in the winter — being careful to avoid a sunburn — as one of the primary ways to make sufficient vitamin D.
Dr. John Cannell, founder of The Vitamin D Council, lists three ways for adults to ensure adequate levels of vitamin D on the Council’s web site.
The Vitamin D Council points out that vitamin D is not a vitamin — it’s a precursor to a hormone intended to be made naturally in the skin. That’s why it’s called “the sunshine vitamin.”
“Humans make thousands of units of vitamin D within minutes of whole body exposure to sunlight,” Cannell says. “From what we know of nature, it is unlikely such a system evolved by chance.”