Red light therapy (RLT) is a popular non-invasive treatment using red and near-infrared light to stimulate cellular function. The Wellness Co highlights its benefits for skin health, including collagen production. Red light therapy (RLT) is a popular non-invasive treatment using red and near-infrared light to stimulate cellular function. The Wellness Co highlights its benefits for skin health, including collagen production. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle