The light is absorbed differently by oxygen-rich hemoglobin (oxyhemoglobin) and oxygen-deficient hemoglobin (deoxyhemoglobin). By measuring changes in the intensities of reflected or transmitted light ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? What’s the first thing you think of when you hear the word light? It’s likely ...

Laser treatments get a lot of buzz for being a noninvasive way to erase blemishes and signs of aging. And while intense pulsed light (IPL) treatments (which are sometimes referred to as photo facials) ...

Getting good skin isn't rocket science — but it does involve a little bit of biology and chemistry. As someone who's covered skin care and beauty for nearly a decade, I've spoken to countless ...

Can shining a red light on your skin improve your sleep, heal your muscles, and make you look younger? Red light therapy (RLT), once confined to medical clinics and elite sports facilities, is now a ...