These 6 Ingredients Don't Mix Well With the Sun

Glycolic acid is an AHA that also acts as an exfoliator. Its primary purpose is to help even out your complexion, improve clarity, and give skin that tell-tale glycolic glow. Like salicylic acid, benzoyl peroxide, and retinol, it's recommended as a night time treatment and should always be paired with SPF the following day.

Glycolic acid is also a very popular ingredient in facials and professional peels. The concentration of glycolic acid for such treatments is even higher than what you'll find in at-home products, so it's best to plan accordingly. In other words, don't get a glycolic peel the day before you go on a beach vacation, and do your best to steer clear of the sun the day-of and to reapply SPF religiously.

"Sunscreen then needs to be reapplied at least every two hours to provide you with protection," reminds Dr. Wrye.

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