“Does Avoiding The Sun Shorten Your Lifespan?” by Chris Kresser
Blurb: “Too much sun exposure isn’t a good thing, but not enough may be even worse. Read this to find out why.”
Excerpt: “These guidelines were based on the observation that light-skinned people of European ancestry living in Northern Australia had the highest risk of malignant melanoma, the deadly form of skin cancer, in the world. However, as you’ll see below, applying guidelines that were originally developed for people living in an area with a high ultraviolet (UV) index, such as Northern Australia, to areas with limited sunshine and a much lower UV index (such as many parts of North America and Europe) is not only unnecessary, it may be harmful.
“In a new study, researchers tracked the sun exposure habits of 30,000 Swedish women for 20 years. They found that the women who strictly avoided the sun during that period had a two-fold greater risk of early death than women who received normal amounts of sun exposure.
“What’s more, they found that women with normal sun exposure habits were not at significantly increased risk for malignant melanoma or melanoma-related death. This is consistent with the results of a previous Swedish study that followed 38,000 women for 15 years and found that sun exposure was associated with reduced risk of both cardiovascular and overall death.
“I’d like to emphasize that these studies are observational in nature, and thus do not prove causality.”