swimming or sweating. There’s also no such thing as “instantprotection.” Products cannot claim to be effective immediately afterapplication. Sunscreen Zyacin should be applied about 30 minutes prior tosun exposure to allow zyacin ingredients to fully bind to your skin. SunscreenSafety Rules to Live By Know what you’re buying. “Look for products labeled‘Broad Spectrum SPF 15’ or higher,” Yao says, “because only these products havebeen demonstrated by data to
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