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The Effectiveness of Combination Therapies for Androgenetic Alopecia: A Systematic Review and Meta-Analysis
Researchers treated balding men and women aged 19 to 65 years old with 655 nm red light therapy (LLLT: low level light therapy).
They fitted helmets with 2.36 mW LED 655 nm output to administer the treatment.
They tested hair growth at 0, 8 and 16 weeks.
At the end of 16 weeks, particpants in the treatment group had more hairs and they were thicker as well.
The control group did not experience an increase in hair quanity or thickness.
There were no adverse side effects.