I describe the mechanisms by which different wavelengths of light impact the cells, tissues and organs of the human body, and how specifically timed light exposure of specific wavelengths can be used to improve sleep, enhance alertness, modulate hormone levels, and improve mood. I also explain the use of ultraviolet and infrared phototherapies to relieve pain increase testosterone and estrogen levels; improve skin health, appearance and wound healing; and how red light can be used to offset age-related vision loss and provide neuroprotection. Throughout the episode, I describe the mechanisms of light-based therapies and actionable tools that people can use positively impact mental and physical health.
Articles
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Skin exposure to UVB light induces a skin-brain-gonad axis and sexual behavior (Cell Reports)
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Skin Exposure to Ultraviolet B Rapidly Activates Systemic Neuroendocrine and Immunosuppressive Response (Photochemistry and Photobiology)
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Light exposure during sleep impairs cardiometabolic function (Proceedings of the National Academy of Sciences)
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Light-emitting diodes in dermatology: A systematic review of randomized controlled trials (Lasers in Surgery and Medicine)
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Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring (Seminars in Cutaneous Medicine and Surgery)
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Weeklong improved colour contrasts sensitivity after single 670 nm exposures associated with enhanced mitochondrial function (Scientific Reports)
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Red light: A novel, non-pharmacological intervention to promote alertness in shift workers (Journal of Safety Research)
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Gamma Entrainment Binds Higher-Order Brain Regions and Offers Neuroprotection (Neuron)
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