Episode #19
Keto for Ultrarunners- What Should You Actually Eat with AI?
Keto & Ultra Running: Fueling Your Body From the Kitchen to the Trail What should a low-carb or ketogenic ultrarunner actually eat—not just during a race, but every day? In this episode, we take a deep look at whole-food nutrition for the ultrarunner , from the grocery store and kitchen to the trail. We explore nutrient-dense foods such as beef, chicken, salmon, eggs, low-carbohydrate vegetables, avocados, olives, nuts, seeds, berries, cheese and other minimally processed foods. We discuss why foods such as pumpkin seeds, walnuts, pecans, macadamias, hemp hearts and fatty fish can provide concentrated calories, protein, healthy fats and important micronutrients while remaining relatively low in carbohydrates. But eating keto isn't simply about adding more fat. We also explore the importance of getting enough total calories, protein, electrolytes, vitamins, minerals and fluids , particularly when training for 50K, 50-mile, 100K and 100-mile events. We look at practical ways to build meals around whole foods: Breakfast Lunch Dinner Snacks Pre-run nutrition Post-run recovery Long-run and race nutrition We also discuss meal preparation, grocery shopping, batch cooking and how to make a whole-food approach sustainable during a busy training schedule. One of the biggest attractions of keto for endurance athletes is increased fat oxidation. Research consistently shows that low-carbohydrate/ketogenic diets can substantially increase the body's ability to use fat for fuel. However, greater fat burning does not automatically mean better race performance . Recent systematic reviews have found mixed or neutral effects on endurance performance, while some evidence suggests high-intensity and repeated hard efforts can be more challenging when carbohydrate availability is low. We discuss the idea of metabolic flexibility —being able to use different fuel sources according to the demands of training and racing rather than treating nutrition as a one-size-fits-all system. We also discuss electrolyte changes during carbohydrate restriction, GI tolerance, inadequate calorie intake and the possibility of unintentionally under-fueling. The goal isn't to promote keto as the perfect diet. It's to help runners understand what the research says, where the uncertainties are, and how to experiment responsibly during training. For ultramarathoners, the International Society of Sports Nutrition recommends an individualized, periodized, food-first approach and emphasizes adequate calories and protein; it also notes that evidence supporting ketogenic diets specifically for improving ultramarathon performance remains lacking. We also examine practical trail foods and preservation. Nuts and seeds are naturally portable, while foods such as cooked meat, eggs and soft cheeses require careful temperature control. USDA guidance states that perishable foods should generally be refrigerated within 2 hours—or 1 hour when temperatures exceed 90°F . Remember: Always test your nutrition strategy during training before race day. What looks perfect on paper may not agree with your stomach at mile 50. Sports Nutrition & Ultrarunning: International Society of Sports Nutrition — Ultra-Marathon Nutrition Position Stand Keto & Endurance Research: PubMed — Ketogenic Diets and Endurance Runners Systematic Review PubMed — Low-Carbohydrate/Ketogenic Diets and Aerobic Performance Whole-Food Nutrition: Harvard Nutrition Source — Healthy Fats Harvard Nutrition Source — Vegetables & Fruits Food Safety: USDA Food Safety Basics This episode is for educational purposes and isn't individualized medical or nutrition advice. ♂️ From the Kitchen to the Trail The Fat-Adaptation Question⚠️ Don't Forget the Risks Real Food on the Trail Resources
