How Blue Light Affects Melatonin and Circadian Rhythm? (October 2026)
Blue light is a high-energy wavelength of visible light (roughly 400 to 490 nanometers) that has the single strongest impact on your body’s melatonin production and circadian rhythm. While all visible light influences your internal clock to some degree, research from Harvard Medical School found that blue light suppresses melatonin for about twice as long … Read more