Sunlight or fake light? We explore how light timing and intensity shape the circadian clock, mood, hormones, fertility, and sleep—and why amplitude is the missing key. Sean Kane shares new research on individual light sensitivity, depression and bipolar patterns, and practical fixes that work. Sean Cain, PhD is a Matthew Flinders professor of circadian biology at Flinders University, Australia. He has more than 25 year of research into human circadian system and how light affects health. Join Dr Cain's Adelaide Research project: http://theilluminatestudy.com/ (see below for more study links). PODCAST SPONSORS 🧡 HARDBLOCK Australia's Longest Running Bitcoin-only (₿) Exchange Use code REGENPOD for AUD 10 of bitcoin post verification https://www.hardblock.com.au/join/REGENPOD SUPPORT MY WORK CONSULT Lifestyle consulting with circadian / mitochondrial & metabolic perspective - https://www.drmaxgulhane.com/offers/5jfDvLyH/checkout 🚨 DAYLIGHT COMPUTER. Blue-light free computer that doesn't wreck your circadian rhythm. Now shipping around the world. Code DRMAX for $25 off. https://buy.daylightcomputer.com/DRMAX 🥩 WOLKI FARM - Regenerative beef shipped around AUS. Highest quality fully grassfed & pastured pork, beef, lamb & eggs raised with holistic principles. Code DRMAX for 10% off. https://wolkifarm.com.au/DRMAX 🚨 VIVA RAYS. Premium blue light blocking glasses with the most useful 3 in 1 clip on frame sets. Code DRMAX for 15% off. https://vivarays.com/dr-maxgulhane 🚨 GEMBA RED. Highest quality photobiomodulation / redlight therapy devices, shipping within the USA. Code DRMAX for 10% off. https://gembared.com 🚨 CHROMA. Advanced photobiomodulation devices including D-light (Vitamin D-generating) & Lux vital with OPN3-5 stimulation, cold pillow for the ultimate night's sleep. Use code DRMAX for 11% off. https://getchroma.co/?ref=i6p39fn0 🚨 MIDWEST RED LIGHT THERAPY. Blue blockers, photobiomodulation devices, shipping to USA. Code DRMAX for 10% offhttps://midwestredlighttherapy.com/affiliate/DRMAX 🚨 BON CHARGE. Blue blockers, EMF laptop pads, circadian friendly lighting, and more. Code DRMAX for 15% off. https://boncharge.com/?rfsn=7170569.687e6d 🎤 PRIVATE MEMBERS GROUP on Skool platform - weekly Q&A, my 52-page eBook, PDF resource downloads & more. USD20/month, cancel anytime. https://www.skool.com/dr-maxs-circadian-reset TIMESTAMPS 2:00 How The Circadian Clock Works 6:30 Ancestral Light Versus Modern Lighting 12:30 Amplitude: The Clock’s Strength Signal 18:00 The Retina’s Hidden Light Sensor 24:30 Melatonin, Blue Light, And Sleep Timing 31:30 Individual Sensitivity To Light 38:30 Light And Mood: Depression And Bipolar 46:00 Risk Taking, Habenula, And Blue Light 53:30 Cortisol, Melatonin, And Rhythms 1:00:00 Skin Light Myths And Real Pathways 1:07:00 Moonlight, Menstrual Cycles, And Fertility 1:15:00 Early Puberty, Seasonality, And Hormones 1:22:00 Longevity, Regularity, And Stable Days Follow SEAN CAIN Join Dr Cain's Adelaide Research project: http://theilluminatestudy.com/ Circadian Health Innovations (mi-eye): https://circadianhealthinnovations.com/mieye X: https://x.com/circadian247 Selected papers Daylight and depression/insomnia: https://doi.org/10.1016/j.jad.2021.08.056 Antidepressant increases light sensitivity: https://doi.org/10.1007/s00213-018-5019-0 Blue light and gamb Send us Fan Mail 🧡 HARDBLOCK Australia's Longest Running Bitcoin-only (₿) Exchange Use code REGENPOD for AUD 10 of bitcoin post account verification Support the show
