Red light therapy requires different approaches in clinics, gyms, spas, and homes. This guide reviews clinical evidence, safety screening, dosing principles, and device selection, helping buyers and operators match equipment to its intended use, verify documentation, and build practical protocols without relying on unsupported claims.

Red light therapy may support muscle recovery by influencing mitochondrial activity, inflammation, and oxidative stress. Evidence is strongest for soreness and exercise-induced muscle damage, while serious injuries require medical evaluation. Proper wavelength, dose, timing, and device quality are essential for safe and effective use.