Amir Bahmani poses for a portrait while holding a photo of himself and his late wife at Stanford University, on Monday, February 25, 2024, in Stanford, Calif. (Photo by Jim Gensheimer)
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.