Skincare Ingredients to Keep Out of the Sun
A Complete Guide to Every Skincare Product You Should Keep Out of the Sun
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Ironically, keeping your SPF in the sun isn't great for your protection either. Dermatologist Ellen Marmur, MD, shared that all skincare products undergo safety and stability testing in indoor temperatures. "Hot sun may inactivate the sun protection and lead to sunburns and increased risk for skin cancers," she said. So when headed out for a beach day, keep your SPF tucked away in an insulated area (think: your water cooler bag), so you don't run the risk of damaging your product.