In 2021, dermatologist David Ozog was on holiday with his family in the Bahamas, when his 18-year-old son had a massive stroke. The teenager was airlifted to Florida, and then to Chicago for surgery.

Red light therapy is a therapeutic technique that uses low-level wavelengths of red light to help treat skin issues. Numerous studies, such as this small study from 2023, have shown that red light ...