"It has been a source of frustration for us that for some sections of the community, the sun-safe message does not seem to be getting through," Dr. Adele Green, a professor at the Queensland Institute of Medical Research at the University of Queensland in Australia, said. "We now know that protecting yourself from skin cancer by using sunscreen has the added bonus of keeping you looking young."
The study, published this week in the Annals of Internal Medicine, also looked at whether taking beta-carotene supplements could have an anti-aging effect. Beta-carotene is a type of antioxidant known as a carotenoid, and has been linked to a reduced risk of skin cancer.
For the randomized-controlled trial, the researchers assigned 903 participants to one of four groups: Those who used broad-spectrum sunscreens daily and take 30 milligrams of beta-carotene, those who used daily sunscreen and took a placebo, those who took the beta-carotene but only used sunscreen periodically, and those who used sunscreen periodically and took a placebo. (All participants were age 55 or younger; the researchers decided it would not be ethical to have a group in which participants used no sunscreen at all.)
The two daily sunscreen groups used UVA/UVB blocking products with a SPF (sun protection factor) of 15 or higher; they applied the product to their head, neck, arms, and hands each morning after bathing, and reapplied it every few hours. The other two groups applied sunscreen where and when they thought they needed it.
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