Biohacking self-improvement light therapy supposedly to reduce inflammation. It has an immediate and noticeable effect on me, strong enough that I doubt it's just placebo. It started when I suffered long-term low-level pain in my ankle several months after twisting it (I hate aging!), and read how light exposure at the right wavelengths could help. My ankle did improve, although of course this might have been just natural healing. Then I started to consider other possible benefits of light therapy such as reducing inflammation in the brain. See this video.
I have very high prior against light therapy on forehead or scalp reducing inflammation in brain. There is thick bone between skin and brain! Blood supply to skin on head is separate system to blood supply to brain. Maybe beneficial effect on skin, creates healing particles in blood, blood carry them to brain. But have to go long way round. Also cross blood-brain barrier.
Phototherapy for SAD is different, more plausible, because proposed mechanism is direct via photonic stimulation of retina to influence biorhythm-generating processes. Signal passes in to ...
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.