Story Highlights:
- A number of companies sell handheld, low-intensity lasers for home use that are intended to stimulate hair follicles, typically three times a week for 10 to 15 minutes.
- Scientists say that low-level lasers are safe and likely do act on cellular compounds that can spur hair growth.
- It's best to try the laser before your hair follicles are too damaged, doctors say. "If you've got a shiny bald head it won't do anything,"
- The only home laser device cleared for hair growth by the Food and Drug Administration is the LaserComb, which claims to increase hair growth in men.
- researchers found subjects using the LaserComb for 26 weeks saw an average increase of 17 hairs per square centimeter, or 7%, compared with a decrease of nine hairs in a control group using a sham device.
- So far the only side effects reported with the lasers have been itching and tingling of the scalp.
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