Photobiomodulation/red light therapy is supposed to affect the mitochondria of the cell making it work more efficiently (?). I have looked into it for Parkinson's unfortunately you have to have strong enough light to reach the cells that need the help. That means you need to go up from red light to near infra red light to infra red light and most of what I have found online is very expensive to get into even the near infrared light area. My husband just made me a red light set up using 670 wavelength which is just below the near infrared light so I don't know if it will help but I'm going to try it for my neuropathy and also on my head for hair loss to see if it can stimulate hair folicles.