Wellness influencers tout the therapy's power for everything from rejuvenating skin and hair to boosting longevity. Devices sold for at-home use abound. We look at the evidence behind the hype.

Red light therapy has become the latest ray of hope in the wellness industry. On social media, influencers claim it can deliver everything from younger-looking skin to more hair growth, better sleep ...

In 1845, Michael Faraday discovered what’s known today as the Faraday Effect—which describes how light and electromagnetism are related. A new study revealed that the magnetic component of light ...