Nearly one in five US adults experience depression, a mental illness with a complex and unknown cause. While antidepressants are common, they often have significant side effects. Bright light therapy (BLT) is emerging as a potential drug-free alternative, showing a 40% remission rate in a recent study. BLT works by influencing mood regulation through retinal ganglion cells. Nearly one in five US adults experience depression, a mental illness with a complex and unknown cause. While antidepressants are common, they often have significant side effects. Bright light therapy (BLT) is emerging as a potential drug-free alternative, showing a 40% remission rate in a recent study. BLT works by influencing mood regulation through retinal ganglion cells. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle