Photo of a mural in Houston by F. Muhammed https://pixabay.com/users/artisticoperations-4161274/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=5342710
Photobiomodulation, the use of light waves to change human biology, has boomed in recent years for all kinds of purposes, at medical clinics and at home. We wanted to know what the science says — and doesn’t say.