Matt illuminates sunlight’s biological impact beyond Vitamin D as he reveals that our eyes contain a hidden daylight circuit wired directly to the brain. These "sky detectors" use bright outdoor light to instantly boost alertness, sharpen attention, and trigger a morning cortisol surge. Lacking this intense daylight indoors leaves us sluggish and out of sync.He also breaks down the lifelong benefits of light exposure, from treating depression to preventing childhood myopia, and shares a zero-cost toolkit to optimize daily light intake. By stepping outside upon waking, moving desks to windows, or using a 10,000-lux light box in winter, anyone can use natural light to steady their mind and health.Please note that Matt is not a medical doctor, and none of the content in this podcast should be considered medical advice in any way, shape, or form, nor prescriptive in any way.In a supplement industry where trust is critical, Matt uses podcast supporter Puori. Their protein powders are free from hormones, GMOs, and pesticides, with every single batch third-party tested for over 200 contaminants. For protein you can trust, save 20% at puori.com/mattwalker.Upgrade your oral care with Redmond Life. This fluoride-free, mineral-based toothpaste uses micro-hydroxyapatite to support enamel and bentonite clay for polishing. No harsh chemicals or artificial dyes - just fresh flavors. Use code WALKER for 15% off your first order at redmond.life/walker.As always, if you have thoughts or feedback you’d like to share, please reach out to Matt:Matt: Instagram @drmattwalker, X @sleepdiplomat, YouTube: https://www.youtube.com/@sleepdiplomat

Ask this episode

“What did the council decide on item 42?” — answered with the speaker and the moment.

Transcript

Related