Does laser hair therapy actually work?

Yes: It works in hair removal.

Laser Hair Therapy: If you mean laser hair reduction, then yes treatments work quite effectively to permanently reduce growth of unwanted hair. To facilitate hair growth, there is a low level laser available, that has been cleared by the fda.

Laser 4 Hair Growth: Low Level Laser Therapy or Laser Therapy, is the use of non-burning, non-scarring, non-heating laser light to impart energy to hair follicles through photobiomodulation to improve hair growth. Many published studies & our experience with thousands of hair loss patients prove its efficacy. The key is powerful/portable device (LaserCap) & consistent use. Dead follicles don't grow hair, get evaluated