Choose the most effective sunscreen

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But the evidence is inconclusive as to whether sunscreens reducethe risk of basal cell cancer and melanoma, the most deadly form ofskin cancer.
And although most of us assume that sunscreens are safe andeffective, we could use some federal quality and safety standards.
Four out of five name-brand sunscreens offer inadequate protection,according to the second annual sunscreen summary by theEnvironmental Working Group, a non-profit environmental researchorganization. Leading brands -- Coppertone, Banana Boat andNeutrogena -- were the worst offenders according to the group,which recommended 143 products at http://cosmeticsdatabase.com .
The oxybenzone debate. The EWG recommends avoiding sunscreens containing the commonlyused chemical oxybenzone out of concern that it can disrupthormones, cause allergic reactions and damage cells. But theAmerican Academy of Dermatology (AAD) recommends oxybenzone becauseit ensures "broad-spectrum" coverage, which means it filters outboth UVA and UVB light. Pick your side.
Be wary of seals of approval. The AAD has been criticized by some of its members for itscommercial endorsement of sunscreens. Many AAD officers have tiesto companies that manufacture sunscreens.
The Skin Cancer Foundation also has a "seal of recommendation"program. But "the main criterion for displaying the seal isdonating $10,000 to SCF to join the Corporate Council," Daviswrote.
For a fee, sunscreen manufacturers such as Neutrogena display theAmerican Cancer Society logo on their products.
The Sun Safety Alliance, which promotes sunscreen use, was foundedby the National Association of Chain Drug Stores, whose memberssell sunscreens, and Schering-Plough, maker of Coppertone,according to Davis.
Don't rely on SPFs. The Sun Protection Factor numbers (SPFs) refer only to the abilityto deflect UVB rays. Look for "broad spectrum" to protect againstboth UVA and UVB rays. An SPF 30 screens 97% of UVB rays; an SPF 15screens 93% of UVB rays. Rather than reach for SPF 70, apply alower number generously and often.
Use at least 7% zinc oxide or titanium dioxide. Zinc and titaniumact as a physical barrier on the skin and, unlike other sunscreenchemicals, don't penetrate the skin, don't show hormone-likeactivity, don't break down in the sun and block a wider spectrum ofthe sun's rays than other products.