6 Reasons Why Sunscreen Is Essential, According to Dermatologists

Dr. Marchbein says that the trifecta of daily skin care products for healthy skin are sunscreen with at least a 30 SPF, retinoids at night, and antioxidant serums for the morning. If you're using the latter two, then SPF becomes even more important (and it's already pretty darn important).

"Not only can many retinoids be inactivated by the sun, but they also tend to make the skin more sensitive to UV rays and more easily able to sunburn. I recommend using retinoids at night to repair skin and fork new collagen, and to apply sunscreen liberally during the day," notes Dr. Marchbein. "Also, antioxidant vitamin C serums, which help to even pigmentation and fight free radical damage, are better able to protect the skin when sunscreen is applied overtop to inactivate the sun's damaging UV rays."

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