Dryness by lunchtime. Makeup settling differently. Redness that wasn't there a year ago. Sensitivity that shows up without warning. These are signs your routine needs to do more than cleanse and hope. Red light therapy belongs in your routine—but it works best beside barrier care, sleep support, and sun-smart habits. This guide shows you how to use red light as real support for changing skin, without expecting one device to solve hormone-driven aging.