We all know that sunlight can cause wrinkles and aging in skin, but light may also pave a path to wrinkle freedom, according to researchers in Germany. Specifically, they found that the red glow from LED lights can smooth skin by adjusting the interactions between water and skin proteins. Elastin, the protein in skin that counteracts wrinkles and makes skin bounce back after stretching, is usually hydrophobic -– meaning it hates water. But with age, the elastin starts to hold on to water and get weighed down, causing sagging and wrinkling. By shining red LED light on skin, the researchers showed that the water molecules became more moveable on older skin and didn’t stick to the elastin.