Much like your bestie prefers red wine and you're more of a dirty martini gal, everyone's skin reacts differently to products. While experimenting and evolving your skin care routine is part of the process of maintaining healthy skin and—ahem—fighting age, it's important to pay attention to how your pores react to formulas. Considering our skin is the largest organ of our body, dermatologist Anna D. Guanche MD says it'll be the first to alert you when it's unhappy with your new face cream, moisturizer or baggy eyes battler. "Your skin—which is a live, very powerful protector of your body—is equipped with a finely tuned, highly sophisticated immune system that is responsible for keeping viruses and bacteria out and the good parts of you in. Sometimes this defense system cross-reacts and an allergy develops," she says.
To supercharge your detective skills, be on the lookout for these clear indications that you should probably toss out a product that's not compatible with personal pH, straight from doctors themselves.
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