Once you listen to this podcast, you'll be getting outside earlier in the day, spending more time outside, you'll feel better about the gloom of winter where you are right now, and you'll be doing all sorts of other things with light. I thought I knew how important light was to our hormones, circadian rhythm and more.  But I was inspired and learnt so much in this podcast.  Roudy is the Founder and Head of Research and Development at VivaRays, an innovative firm with glasses transforming the way in which people work, sleep and live. Drawing on his own experiences and background in engineering, Roudy has designed a range of glasses for part of the day, blocking specific wavelengths.   This week's podcast is proudly bought to you by an awesome Black Friday deal! Gift cards and clothes are impersonal and expected… so why not get your loved ones a gift that is truly special and unique to them. This Black Friday, save $200 on InsideTracker’s Ultimate Plan + Free InnerAge—the most comprehensive way to get personalized insight into their body’s wellbeing. No two people achieve optimal health the same way. Age, genes, nutrition, and lifestyle all play a part—but no matter who you’re shopping for, InsideTracker’s personalized nutrition and performance system provides the most detailed analysis of their biomarker data from blood, DNA, lifestyle, and fitness tracking. InsideTracker gives them the power to live a healthier, longer life through concrete, personalized action plans consisting of proven, science-backed recommendations. So, head to Zestology listeners save 25% off! today to save $200 on InsideTracker’s Ultimate Plan + Free InnerAge—and enjoy 25% off sitewide—to give the gift of personalized health.