Health & Fitness

Peeking behind the sunscreen

Peggy Lim has a healthy respect for the sun's powerful ultraviolet rays, and on a recent shopping trip she agonized over choosing a sunscreen for her three children.

"I've always heard the higher the SPF [sun protection factor] the better, until you get to SPF 45," said Lim, who finally bought whatever happened to be in front of her. "Now my husband says the SPF doesn't matter as much as how much you use. What's the right amount? Do I have to apply it under their clothes? And how bad of a mother am I if I forget to reapply it?"

Like many people, Lim, of Crystal Lake, Ill., wants reliable sunscreen information to help sort fact from fiction. But although the U.S. Food and Drug Administration drafted guidelines three decades ago governing the safety, efficacy and labeling of sunscreen, official rules have yet to be implemented.

Critics of the agency say the lack of formal regulations has spawned misleading claims on products and put consumers at risk by encouraging them to rely too heavily on sunscreen for protection.

The FDA expects to finalize the rules in October; they would take effect by 2012.

In the meantime, to help consumers make decisions — and light a fire under the FDA — the Environmental Working Group recently released its annual Sunscreen Safety Guide, which rates sunscreens, lip balms and moisturizers, and features a database searchable by brand name. Consumer Reports has issued its sunscreen guide as well.

The Environmental Working Group, an advocacy organization that has waged a four-year campaign promoting strict sun-safety standards, slammed the majority of the 1,400 products it tested. It recommends only 39 of 500 beach and sport sunscreens, primarily because of what it called "a surge in exaggerated SPF claims above 50" and concerns about ingredients in the products.

"Hats, clothing and shade are still the only completely reliable sun protection," said Jane Houlihan, the group's vice president for research.

In fact, the long-delayed FDA rules would update labels to stress the importance of a comprehensive approach to sun protection that encourages seeking shade and covering up.

Sunscreen can help protect against sunburn, but contrary to what most people think, it hasn't yet been shown to prevent skin cancer or premature skin aging, according to the FDA.

Research has found that people who use sunscreen tend to stay in the sun longer than they might otherwise. That is particularly true if a product has a high SPF number, ratings the Environmental Working Group says "sell a false sense of security."

The group reported a 33% increase from last year in the number of products labeled with an SPF higher than 50. But the new federal guidelines would cap SPF claims at 50-plus because there's little evidence that higher SPF products offer more protection.

SPF numbers, a familiar but baffling system for consumers, primarily measure protection from the UVB (ultraviolet light with a shorter wavelength) rays that cause sunburn.

A product labeled SPF 15 blocks about 93% of the sun's UVB rays; an SPF 50 protects against about 98%, said Dr. Henry Lim, chairman of the department of dermatology at Henry Ford Hospital in Detroit.

Because 100% blockage isn't possible, products labeled SPF 70 or 100 don't make much sense, Lim said.

"Rather than increasing SPF factor, the push now is to make a sunscreen product cover both UVA and UVB — how to make it broader," he said.

UVA (ultraviolet light with a longer wavelength) radiation facilitates tanning but also can damage the DNA of cells deep within the skin, contributing to skin cancer and premature aging.

Though many products are labeled "broad spectrum," consumers can't currently tell how much protection a sunscreen provides against UVA rays. . Under the proposed guidelines, labeling would be expanded to include a four-star system that tells consumers how well the product protects against UVAs.

The term "waterproof" would be prohibited, and labels on water-resistant sunscreens would have to state how often the products need to be reapplied.

jdeardorff@tribune.com

Copyright © 2014, Los Angeles Times
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