From Newsgroup: sci.misc
The surprising science behind red-light therapy -- and how it really
works
People are buying helmets, face masks, vests and beds that emit
long-wavelength light. Beneath the hype, there is some interesting
biology.
...
...
Experts warn that there is considerable hype about red-light therapy.
But a growing body of legitimate science has been exploring the
benefits for several conditions. Clinical studies have reported
improvements in peripheral neuropathy1, retinal degeneration2 and
certain neurological disorders3. For some indications, expert groups
now recommend red-light regimens1.
Researchers are also uncovering how red and near-infrared light might
exert these effects. Mitochondria -- the power plants of the cell --
are emerging as a central piece of the puzzle.
The science behind these benefits is growing at a time in which humans
are exposed to less red light than ever before. People spend more time
indoors away from the Sun, and efforts to conserve energy have
narrowed the spectrum of indoor lighting, eliminating many red and near-infrared wavelengths (see 'Light by the source'). Some scientists
are now asking whether these factors might have biological
consequences. "We're literally being starved of something that,
biologically, we've evolved to receive," says Ozog
https://www.nature.com/articles/d41586-026-00878-1
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