In this episode, I sit down with Dr. Martin Moore-Ede, a world-leading expert in circadian biology and the founder of Circadian Light, to explore how artificial light has quietly but profoundly reshaped human health. We live in a 24-hour society, surrounded by screens, LED lighting, and indoor environments that disconnect us from the natural rhythms our biology evolved with. Dr. Moore-Ede explains how this shift has altered our circadian timing systems, impacting everything from sleep and metabolism to immune function and long-term disease risk. We dive into why circadian rhythms regulate far more than just sleep. They control hormonal balance, appetite, glucose metabolism, inflammation, cognitive performance, and even cellular repair. When these rhythms become disrupted, whether through jet lag, late-night screen exposure, or shift work, the consequences ripple throughout the body. We discuss the science behind jet lag and why it feels so destabilizing, not just mentally but metabolically. We explore how mistimed light exposure can increase hunger, alter insulin sensitivity, and contribute to weight gain. For shift workers, who experience chronic circadian misalignment, these risks can compound over time. Dr. Moore-Ede also clarifies the truth about blue light. It isn’t inherently “bad” in fact, blue-enriched light during the day supports alertness, mood, and cognitive function. The issue is exposure at the wrong time. He explains when blue light blocking glasses can be helpful, how to use them properly, and why daytime natural light exposure is essential for learning, mental clarity, and overall resilience. We also touch on one of the most fascinating areas of his work: hospital lighting. Emerging research shows that circadian-aligned lighting in healthcare settings can improve recovery times, strengthen immune response, and support better patient outcomes. Optimising light may be one of the most overlooked longevity interventions available today. For midlife women in particular, this conversation is powerful. As we move through perimenopause and menopause, circadian rhythms can become more fragile. Sleep disruption, weight changes, mood shifts, and inflammation are often amplified by poorly timed light exposure. Understanding how to structure your light environment may be one of the simplest yet most effective tools to restore energy, improve sleep quality, and protect long-term brain health. This episode will change how you think about light. It’s not just about brightness, it’s about biology. Where to Find Dr. Martin Moore-Ede: Website: https://thelightdoctor.comInstagram: @circadianlightdoctor If this episode resonated with you, share it with someone who struggles with sleep, fatigue, jet lag, or shift work. And if you’re loving these science-backed longevity conversations, subscribe and leave a review, it helps bring even more world-class experts to the show.
