Why Does Blue Light Affect Sleep?
We all know we shouldn't scroll before bed — but has anyone actually explained why blue light disrupts sleep?
In this episode, Jen, Chris, and Matt unpack the biology behind one of modern life's most common habits. Specialised cells in your retina contain a protein called melanopsin that is maximally sensitive to blue light wavelengths — the same wavelengths emitted by our screens. When those cells fire, they signal your brain's master clock that it's daytime, suppressing melatonin and delaying your body's natural wind-down process. Your circadian system, it turns out, cannot distinguish your…
The skinny
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