Light exposure plays a crucial role in regulating sleep cycles. As red light therapy grows in popularity, a common question arises:
does red light therapy affect sleep?
Unlike blue light, red light interacts with the body in a very different way.
Red Light vs Blue Light
Blue light is known to:
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Suppress melatonin
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Delay sleep onset
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Disrupt circadian rhythm
Red light, however:
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Has minimal impact on melatonin suppression
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Is less stimulating to the brain
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Is often considered sleep-friendly
How Red Light Therapy Works
Red light therapy uses specific wavelengths (typically 630–660 nm and near-infrared) that penetrate tissues and stimulate cellular energy without triggering alertness pathways in the brain.
What Research Suggests
Studies indicate red light exposure may:
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Support circadian rhythm balance
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Improve relaxation responses
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Reduce sleep-disrupting stress
Conclusion
So, does red light therapy affect sleep?
Yes—but generally in a positive or neutral way, especially when compared to other forms of artificial light.