When I was growing up, my parents insisted I shampoo daily — otherwise, my hair and scalp would be “dirty,” and there was ...

If you're willing to live with the handling quirks, this dryer's results speak for themselves.

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.