Use vitamin C in the morning and retinol at night to avoid skin irritation. Vitamin C protects against photodamage and should ...
To counter the signs of aging or treat acne, start slow and be patient. By Melinda Wenner Moyer Over-the-counter retinol products are popular for good reason: In addition to helping to control acne, ...
Moisturizers, serums and other items degrade over time. Here’s how to know when it’s time to stop using them. Credit...Eric Helgas for The New York Times Supported by By Erica Sweeney Q: I have a ...
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