iVillage: 15 Bad Habits That Are Actually Good For Your Health

“Forgetting” Your Sunscreen

Recent research at the Missouri University of Science and Technology suggests that constantly coating yourself with sunscreen could actually increase your risk of skin cancer! One of the reasons, say the Missouri researchers: Some of today’s common sunscreen ingredients are chemically changed when they’re blasted with UV light -- and the byproducts they produce can damage your skin if you’re exposed to them nonstop. “Plus constantly wearing sunscreen stops your skin from making vitamin D -- a nutrient that actually stops skin cells from turning cancerous,” adds Michael Holick, M.D., professor of medicine at Boston University. To protect yourself: Soak up 15 minutes of sunshine every day before slathering on your sunscreen -- and if you’ll be outdoors for less time than that, you can skip the stuff entirely, Dr. Holick says.

(CREDIT: GK Hart/Vikki Hart/The Image Bank/Getty Images)
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