Why Zach Bitter Went High Carb After 14 Years of Low Carb Fueling

About this episode

Zach Bitter discusses his transition from low carb to high carb fueling after 14 years and its impact on his performance.

What if the fueling strategy you’ve followed for years is no longer the one that best supports your performance? In Episode 131 of The Eat for Endurance Podcast, I’m joined by elite ultrarunner and coach Zach Bitter for a thoughtful conversation about his experience with both low and high carb fueling. After following a low carb diet for 14 years, including when he broke the World and American Records in the 100-mile distance, he decided to change course and try high carb fueling. It's been 8...

People in this episode

Host: Claire Shorenstein

Guest: Zach Bitter

Topics covered

• fueling strategies
• high carb diet
• low carb diet
• ultrarunning
• performance nutrition

Keywords

• Zach Bitter
• high carb fueling
• low carb diet
• ultrarunning
• nutrition

More episodes of The Eat for Endurance Podcast

• Grayson Murphy on Crohn's Disease, Performance Anxiety, and Fueling as a Pro Runner · June 11, 2026 · 1h 14m
• What Is Food Noise? A Dietitian's Personal Experience with GLP-1 Medications · May 28, 2026 · 1h 31m
• Why Endurance Athletes Struggle with GI Issues (And How to Actually Fix Them) · May 14, 2026 · 1h 17m
• How Much Protein Should Athletes Actually Eat? · April 30, 2026 · 1h 26m
• GLP-1 Medications: What Active People Need to Know · April 16, 2026 · 1h 7m
• From PowerBar to JAMBAR: Jennifer Maxwell on Fueling Athletes, Raising 6 Kids, and Life Beyond Running · April 2, 2026 · 48 min