Take a look at this. PDF format.
http://www.fda.gov/cdrh/pdf6/K060305.pdf
Quote :
A multicenter, randomized, placebo-controlled trial was conducted at four sites in the United States. Subjects received either the LaserComb or a sham device. Subjects were instructed to use de device three times per week on nonconcurring days for a total of 26 Weeks. Subjects in the lasercomb treatment group had significantly greater increases in mean terminal hair density than subjects in the placebo group. Subjects in the lasercomb group also had significantly better subjective assessments of overall hair regrowth than subjects in the placebo group. No subject experienced a serious adverse event and the adverse event profiles were similar between the two treatment groups. In all instances, the LaserComb functionned as intended and the hair regrowth observed was as expected
end of quote.
http://www.fda.gov/cdrh/pdf6/K060305.pdf
Quote :
A multicenter, randomized, placebo-controlled trial was conducted at four sites in the United States. Subjects received either the LaserComb or a sham device. Subjects were instructed to use de device three times per week on nonconcurring days for a total of 26 Weeks. Subjects in the lasercomb treatment group had significantly greater increases in mean terminal hair density than subjects in the placebo group. Subjects in the lasercomb group also had significantly better subjective assessments of overall hair regrowth than subjects in the placebo group. No subject experienced a serious adverse event and the adverse event profiles were similar between the two treatment groups. In all instances, the LaserComb functionned as intended and the hair regrowth observed was as expected
end of quote.