According to researchers at the Baqiyatallah University of Medical Sciences in Tehran, it might be more feasible to use laser therapies separately rather than in combination to remove unwanted body hair. The study was published in the October issue of the Archives of Dermatology.

Study Highlights
a. This study was conducted on 15 people.
b. The participants were given 4 treatment sessions at 8-week intervals.
c. Researchers compared the removal of hair on the legs of the participants by using either long-pulsed 755-nanometer alexandrite lasers (12- and 18-millimeter spot sizes), long-pulsed 1,064 nanometer Nd:YAG laser (12-millimeter spot size), or a combination of alexandrite and Nd:YAG 12-millimeter spot size lasers.
d. They measured the average hair density with a hair counting device and special software and assessed hair reduction by comparing digital photographs taken before treatment and at 8 and 18 month follow-up sessions.
e. It was noticed that the average hair reductions 18 months after final treatment were 75.9 per cent for the 12-millimeter spot size alexandrite laser, 84.3 per cent for the 18-millimeter spot size alexandrite laser, 73.6 per cent for the Nd:YAG laser and 77.8 per cent for the combination therapy.
f. Leg areas that received the alexandrite laser treatments had higher average pain severity than those treated with the Nd:YAG laser.
g. The highest amount of pain was in areas that received the combination treatment, which were also more likely to have hyperpigmentation.
h. There was no significant difference between the efficiency of the alexandrite and the Nd:YAG laser.
i. The alexandrite or Nd:YAG laser systems, if used for at least 4 treatment sessions and with 8-week intervals resulted in long-term results with acceptable and transient adverse effects.