Infrared or even red light penetrate deeply in our body, 10, 20 cm. The mitochondria make atp from glucose+oxygen but also cause free radicals (think bad combu

Infrared or even red light penetrate deeply in our body, 10, 20 cm. The mitochondria make atp from glucose+oxygen but also cause free radicals (think bad combustion) those float around and destroy what they touch. To remove those the mitochondria also make melatonin(powerful antioxidant) that scoop up the free radicals so they can be eliminated but to make melatonin they need infrared radiation, I guess they evolved that way, infrared was available all day when activity was highest. Now our brain make melatonin in the night, this would be the back up plan so that we don’t have to much inflammation at night when our activity level is reduced. If you have an infection your system is working overtime to fight the virus, causing more free radicals/inflammation. It seem a big part of blood clothing in covid is an inflammation overload. Compounding that overweight people are naturally more prone to inflammation. overweight + inside + infection + spike protein = clotting of blood.