If you feel like you've tried everything for your hair loss and thinning hair—I'm talking things like hair-growth vitamins, hair-growth shampoos, castor-oil hair treatments—with no success, you may want to consider a red light therapy hair-growth device. These devices come in a variety of forms (helmets, hats, combs, brushes, etc.) and many of them make some pretty impressive claims, like helping to regrow lost hair in as little as a few months. These devices sound like the dream—but do these hair growth gadgets actually work?

According to dermatologist and hair-loss expert Craig Ziering, DO, these at-home treatments can be beneficial for hair growth. But there are a few things you need to consider before choosing the best hair-growth remedy for your needs (don't worry, we get into it all with Dr. Ziering below). Keep scrolling for the details, plus the best solutions on the market, according to Dr. Ziering, Cosmo editors, and first-person reviews.

Keep scrolling for our top picks for red light therapy devices, plus important info from Dr. Ziering about how hair-growth devices work and which ones you should try.