EPISODE · Feb 25, 2026 · 54 MIN
Circadian Rhythm 101: The Missing Link Behind Sleep, Hormones & Metabolism (Ep. 59)
from The Wellness Effect (A Lifestyle U Podcast) · host Lacey Iskra, Jensen, Kira Iskra
If you feel tired but wired, struggle with hormone imbalances, poor sleep, blood sugar crashes, or stubborn symptoms, the issue may not be what you're eating, but when. Your circadian rhythm is the master system coordinating your hormones, metabolism, digestion, and nervous system. In this episode, we break down circadian rhythm in a practical, real-life way. This isn't just about sleep. It's about how your body knows what time it is and what it should be doing. We cover how light, food timing, and movement act as biological signals for cortisol, melatonin, thyroid function, mitochondrial health, and even hormone production. We also dive into why poor sleep, PMDD, irregular cycles, afternoon crashes, and even skin flare-ups may stem from circadian disruption. If you've been focusing on supplements, elimination diets, or protocols without seeing results, this episode will show you the foundational layer you might be missing. What You'll Learn In this episode, we discuss: What circadian rhythm actually is (and why every cell has a 24-hour clock) How cortisol and melatonin should rise and fall naturally The difference between sunrise, UVA rise, and UVB light How circadian rhythm impacts thyroid hormone conversion (T4 to T3) Simple habits to support sleep, metabolism, and nervous system regulation Chapters 00:00 – Why circadian rhythm impacts hormones & sleep 04:14 – Every cell runs on a 24-hour clock 09:44 – Cortisol timing, digestion & metabolism explained 14:23 – Sunrise: the master reset signal 20:53 – UVA rise & hormone production (pregnenolone, thyroid, insulin) 27:45 – Sunset & melatonin preparation 32:18 – The role of food timing in circadian rhythm 35:29 – Vitamin D vs. melatonin (seasonal shifts explained) 39:09 – Movement timing & workouts 41:36 – Signs your circadian rhythm is off 45:55 – Practical habits you can implement immediately Resources & Mentions My Circadian App Circadian Rhythm Resource Blue Light Glasses Circadian Lighting How to Turn Your iPhone Red Want to Work With Us? Join us in the Root Cause Reset Program: https://www.lifestyleucoaching.ca/wellness-effect-906145 and use code "Wellness Effect" for a FREE functional lab test when you join the program. Follow us on Instagram: The Podcast: @thewellnesseffectpod Lacey Iskra - @laceeiskk Jensen - @wellnesswjensen Kira Iskra - @kiraiskk Lifestyle U have helped over 1,000+ women transform their mind and body and become the best version of themselves. Want to be next? Click Here to Apply! - https://www.lifestyleucoaching.ca/apply If you loved this episode and want to hear more, subscribe and leave a review! Share this episode with a friend who's ready to start their own wellness journey. Follow us on Instagram at @thewellnesseffectpod to stay up-to-date with the latest episodes and tips.
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Circadian Rhythm 101: The Missing Link Behind Sleep, Hormones & Metabolism (Ep. 59)
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