So it's been two week since I started using the HairMax laser comb to regrow rejuvenate my once luscious locks of hair and so far, well, as you can see—nothing. The company recommends using it 3x a week for 10-15 minutes. I've been using it 4x a week (I'm in a rush) usually at the end of my day for about 12 minutes. My arm has gotten stronger from combing my hair for that long, otherwise no side effects, no changes, nothing.

Lab Rat Week 1 [Gizmodo]