Jonathan Cedernaes: Circadian Health from Molecular Clocks to Public Policy - David Rönnlid Podcast #14

🌍 How can we align our lives — and our societies — with our body clocks?Poor sleep and circadian misalignment don’t just make us tired — they impair several aspects of our metabolic health. I sat down with Jonathan Cedernaes, M.D., Ph.D., and explored what we can do about it: from personal daily habits to systemic policy reforms. Sleep quality and quantity isn’t just about recovery — it’s a public health issue.We dive deep into:✅ Daily habits that keep your circadian rhythm aligned✅ Why sleep timing is as important as sleep duration✅ How late nights and irregular schedules impair metabolism and long-term health✅ Policy changes that could protect circadian health at a population level — from school start times to shift work regulations✅ The promise of circadian science for future treatments and prevention strategies💡 What do you think matters more for our collective health: better personal habits or policy reforms?#SleepScience #CircadianHealth #Metabolism #PublicHealthSleep science group: https://www.facebook.com/groups/495466987134152/Connect with Jonathan on social media:X: https://x.com/jcedernaesIG: https://www.instagram.com/sleepydrcedernaesclocks/Episode chapters:00:00:00 Introduction00:02:05 Sleep as a Driver of Motivation and Healthy Habits00:04:15 Weekend Catch-Up Sleep: Benefits and Limits00:07:50 Sleep, Metabolic Health, and Obesity Links00:10:13 Sleep Disruption and Neurodegenerative Disease00:12:53 Mechanisms: How Neurodegeneration Impairs Sleep00:18:30 Supplements, Exam Stress, and Slow-Wave Sleep00:20:01 The Body's Master Clock in the Brain: The Suprachiasmatic Nucleus00:23:20 Light, Retina, and the Body’s Internal Timekeeping00:43:16 Late-Night Eating and Sleep Quality00:46:00 Heart Rate Variability: What It Really Tells Us00:52:10 Short Sleepers, Long Sleepers, and Individual Needs01:05:22 Circadian Misalignment: Jet Lag and Shift Work01:19:44 Sleep and Mental Health Connection01:33:11 Diet Timing, Fasting, and Circadian Rhythm01:43:52 Exercise After Sleep Loss: Helpful or Harmful?01:56:20 MicroRNAs, Sleep Loss, and Neurodegeneration Risk02:14:36 AI, Research, and Sleep Science in the Future02:22:06 Summary of most important takeaways from the conversation