The Importance of Melatonin Production in the Mitochondria

Glutathione is an important molecule. It's intracellular of primarily, although there's some also in the actual cell of the space. Under stress, all cells may upregulate their ability to produce melatonin because it's so highly protective and typically under stress free radicals are generated. And of course, you're right about near infrared radiation. It penetrates the skin and activates melatonin synthesis so far as we can tell. That's a very new field.