How do laser hairbrushes promote hair growth?

https://www.evernote.com/shard/s451/sh/7ca3837f-7d7f-dd80-5b43-960f1c135e96/5ab47160154bf55e2659306917640540

https://canvas.instructure.com/eportfolios/103352/Home/Womens_Hair_Health_and_Laser_Hair_Brush

http://www.fxstat.com/en/user/profile/hairbrushes2020-214001/blog/35144004-The-best-brush-for-your-hair---Denman-Hair-Brush-at-Present

https://medium.com/@wixati4282/the-ultimate-guide-to-knowing-various-things-about-mens-hairbrushes-dea73df7f28a

https://www.sportsblog.com/laserhairbrushes/how-do-laser-hairbrushes-promote-hair-growth/

https://topsitenet.com/article/455815-tips-for-the-benefits-of-using-hairbrush-irons/