A laser hair growth comb is the latest product on the market that utilises low-level laser therapy technology (or LLLT for short) as a hair loss treatment. When done correctly LLLT can be quite effective for stimulating hair growth. Laser light therapy ISN’T a miracle for hair loss. However, it has been shown to be effective in improving your condition. This laser light therapy houses a fillable tank so that you may put your H2O or Boost+ in for maximising your use. Results may vary.