I've spent all day on my laptop watching videos of Vielight and other NIR companies trashing each other while extolling their own NIR products. What I've come to understand is that testing proves that NIR therapy cannot work. Lasers lose a million percent of their energy while flowing through skin, skull and brain. The last video reminded me of two carnival barkers as they pitch their products.
BUT...it ends with the statement that it does work clinically. They see improvement in soldiers with PTSD and patients with Parkinson's.
One presenter talked about breaking the back legs of rabbits then shining a NIR laser on one leg. He said BOTH injured legs healed equally well. The same effect is commonly seen in TCM acupuncture. All the while they're talking I'm screaming at the laptop, "Placebo" and "TCM" and "Acupuncture!" TCM is traditional Chinese medicine. TCM says energy moves through channels in the body. The energy is Xi (pronounced Chee) Western medicine expounds on that to say when one leg is treated nerve pulses go from the injury to the brain and send messages back to BOTH injured legs.
So laser light stimulates meridians in one spot which makes Xi move in both areas of injury.