And what of non-sunscreen cosmetic products, used by millions of women, that claim to have bundled SPF protection into the mix?
Green cautioned that there is no replacement for true sunscreen.
"Moisturizers with UV protection give brief sun protection," she acknowledged, "but sunscreens last much longer on the skin and provide more durable protection."
Dr. Beth McLellan, an assistant professor at the Ronald O. Perelman Department of Dermatology at the Joan H. Tisch Center for Women's Health at NYU Langone Medical Center in New York City, said the findings add more evidence that sunscreen works.
"We already know that sunscreen can prevent skin cancer and this study shows that regular use of sunscreen can also help prevent aging -- all the more reason to incorporate sunscreen into one's daily skincare regimen," she said.
For more on sunscreens, visit the U.S. National Library of Medicine.
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