After 16 weeks of daily use, our WIRED testers saw visible hair regrowth with these red-light therapy devices.
Related Posts
The Best Cat Litter Depends on Your Cat and Type of Litter Box
Between clay, tofu, crystal, and more, here’s how to determine the best type of cat litter for your home (and cat).
EcoFlow PowerOcean Battery Review: Cutting My Bill in Half
Whether you want to buy cheaper electricity, store solar energy, or guard against outages, EcoFlow’s home battery might be just what you need.
14 Best USB Flash Drives (2025): Pen Drives, Thumb Drives, Memory Sticks
These WIRED-tested memory sticks are a virtual filing cabinet in your pocket.