Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? At the simplest level, different colors of light have different wavelengths.

Many of you have likely seen mask-type or handheld devices that glow red or blue in the home beauty device section. In this category, known as LED facial devices, the packaging describes different ...

Since a 19th century theory put forward by German physiologist Ewald Hering, color scientists have considered the hues red, ...

If your TikTok feed is full of glowing, sci-fi-esque LED masks, you’re not alone. Red and blue light therapy devices have officially become the newest beauty shelfies, with creators flooding TikTok ...