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| | | | | When NASA scientists noticed their hands healing faster around the lights they used to grow space vegetables, they stumbled onto something big. Three decades later, researchers have discovered that specific wavelengths of red light can reduce blood sugar levels by 30% in just 15 minutes. | | This discovery is part of a revolution in understanding how light affects our cells, and it might change medicine as we know it. Scroll down to learn more about what the research shows so far. | | | | | | | Reddy, set, go,
Tim Snaith
Newsletter Editor, Healthline |  | | Written by Tim Snaith
February 7, 2025 • 3.5 min read | | | | | | | |
| |  | | | Is red light therapy the next big thing in health? | | Red light therapy (RLT) began in 1967 when Hungarian scientist Endre Mester made an accidental discovery: laser light appeared to help with hair growth and wound healing in his laboratory rats. This finding launched a field of study so diverse that it now goes by nearly 60 different names, from photobiomodulation to cold laser therapy. | | Decades later, NASA's work with LED lights for growing plants in space added crucial evidence. Their scientists noticed accelerated healing in their hands, leading to research on how red light might help astronauts with muscle loss and bone density issues in zero gravity. | | The most recent study shows that exposing skin to specific red light wavelengths for just 15 minutes reduced blood sugar levels by almost a third in healthy adults. The potential diabetes treatment is intriguing as it can be delivered without drugs or surgery simply by applying red light to the skin for a period of time. | | However, you can't use just any old red light — using a red bulb or downloading an app for your phone won't work — I checked! | | Success depends on using specific wavelengths of red light to affect our cells. The correct wavelengths can penetrate without generating heat, reaching depths of 1 to 2 millimeters. There, the light interacts with mitochondria — our cells' energy generators — potentially boosting their efficiency and enhancing self-repair. | | Research over the past 20 years has revealed numerous applications. Studies suggest benefits ranging from tissue repair to managing specific conditions like psoriasis and carpal tunnel syndrome, certain cancer treatment side effects, and neuropathic pain. | | RLT also shows promise for supporting cognitive function and weight loss, though more studies are needed to confirm these potential perks. | | While this therapy is generally safe and painless, precision matters, and proper precautions are still needed to prevent the risk of side effects. The wrong exposure time or damaged equipment can cause burns or blisters. Eye protection is also essential. And anyone with cancer should consult their doctor first, as research shows mixed effects. | | We've always known light is essential for life. Now, we're learning it might also be essential for healing. All we had to do was tune into the right wavelength. | | | | | | | | |  | | Watch this video to learn if your psoriasis skin care routine is harming your skin and what you can do to fix the damage. | | | | | | | | | | | | | That's all for today!
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