This article is a part of CNN Underscored’s Guide to Age-Defying Beauty, a weeklong focus on the essential products, tips and tricks to enhance your glow at any age. We’ll be featuring editor-tested ...

Red light therapy (RLT) involves exposing the body to low-wavelength red or near-infrared light (IRL). Red and near-IRL differ slightly in terms of wavelength and visibility. Red light is visible to ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Rory Evans Rory Evans is a writer focused on skin-care and beauty products.

Our expert staff answers frequently asked questions in their areas of expertise and defines common terms so you can be a smarter shopper. Read more here. Red LED face masks have dominated the ...