November 25, 2025
Nutrition for Ultrarunners: The Science, Myths, and Strategies That Actually Work with Claire Shorenstein
Everyday UltraAbout this episode
If you’ve ever struggled with GI issues, hydration confusion, high-carb hype, or figuring out what to eat as an ultrarunner… this episode is going to change everything. In this conversation, I sit down with Board-Certified Sports Dietitian, endurance athlete, and host of the Eat for Endurance podcast — Claire Shorenstein — to break down the nutrition strategies that actually matter for long-distance runners. We dive deep into the real science behind fueling, hydration, gut training, electrolytes, and everyday nutrition habits — and Claire shares incredibly practical insights that every ultrarunner needs to hear. Inside the episode, you’ll learn: • Why GI issues happen — and the specific steps to prevent them • How to use sodium the right way (and why many runners overdo it) • Whether high-carb fueling is right for you — and how to know • The hydration mistakes causing stomach blow-ups late in races • What everyday nutrition should look like for busy runners • How to fuel when appetite is suppressed or your schedule is chaotic • The truth about supplements — and who actually needs them • Why foundational nutrition matters more than “sexy” strategies • How to personalize your fueling using real science, not trends This episode is PACKED with actionable advice, myth-busting clarity, and ultra-specific insight you can use immediately in your training and racing. Whether you're brand new to ultras or deep into 100-milers, this conversation will help you fuel smarter, feel stronger, and perform at your best. SHOW LINKS: Want to be coached by me and my team to crush your next ultramarathon in our 1:1 coaching program? We have a Black Friday Sale NOW for 30% off your first month! Book a free call with one of our coaches to see if we are a good fit at theeverydayultra.com Register for our race, The Desert Peak Ultra 100K + 50K at desertpeakultra.com Want to work with me to crush your next ultramarathon in our group coaching program? Sign up for our group coaching program here: https://www.theeverydayultra.com/group-coaching Follow Joe on IG: https://www.instagram.com/joecorcione/ Everyday Ultra YouTube Channel: https://www.youtube.com/channel/UCUelKGeptWZivD6yRIDiupg Get 25% off TrainingPeaks Premium to track and plan your training better by signing up here and use code CYBER2025 Try CurraNZ to boost recovery and performance and get 15% off your first order with code EVERYDAYULTRAPOD at www.curranzusa.com Try PlayOn Pain Relief Spray at playonrelief.com Try Bear Butt Wipes and get 10% off your order with code EVERYDAYULTRA at bearbuttwipes.com Try Janji apparel and get 10% off your order with code EVERYDAYULTRA at Janji.com Claire's Fuel for Life Crew Membership: https://www.eatforendurance.com/fuel-for-life-crew Claire's Podcast: https://www.eatforendurance.com/podcast Claire's 1:1 Services: https://www.eatforendurance.com/virtual-nutrition-coaching-for-athletes