PBM light therapy regulates blood pressure, blood sugar and the lactic acid content of the blood. Light therapy increases metabolic energy, perseverance and stress tolerance, and light optimises the abilities of the blood to transport and absorb oxygen. Light therapy has a direct influence on the sexuality, potency, and stimulation of the production of endorphins, which have a direct effect on the immune system. Melatonin production within the body is directly dependent on light. After recent discoveries light is also able to reduce the effects of electro-smog. Electro-smog is the modern word for disturbing electro-magnetic fields which are coming from electric devices and machines. Recent research results of the neurologist C. Norman Shealy showed that short irradiation with specific colours causes a steep rise in the production of Noradrenalin, Serotonin, Beta-endorphin, Melatonin, Oxytocin, Gonadoliberin, Cholinesterase, growth hormones and other important hormones as well as various other neuro-active enzymes. Our brain has a special sensor for light, the pineal gland. It controls the production of many hormones directly. These light active hormones manage all important vegetative functions of our body and mind therefore the foundations for health and wellness depend on light.

COVID-19: Photobiomodulation: Shining Light on COVID-19, Fernandes et al. (pdf)