Best Supplements for Endurance Performance
Endurance athletes need optimised oxygen delivery, efficient energy metabolism, electrolyte balance, and inflammation management to perform at their best over sustained efforts.
Top 5 Recommended Supplements
Beta Alanine
3.2-6.4g dailyIncreases muscle carnosine for acid buffering. Benefits efforts lasting 1-10 minutes and repeated high-intensity efforts within endurance events
Buy on Amazon →Beetroot Juice/Nitrates
400-800mg nitratesIncreases nitric oxide, improving oxygen efficiency by 3-5%. Equivalent to 500ml beetroot juice 2-3 hours before exercise
Buy on Amazon →Caffeine
3-6mg/kg body weightReduces perceived exertion, enhances fat oxidation, and spares glycogen. Proven ergogenic aid in every endurance study
Buy on Amazon →Iron
Monitor ferritin levelsEndurance athletes are at high risk of depletion. Ferritin should be >50 for optimal oxygen transport. Test regularly
Buy on Amazon →Sodium Bicarbonate
200-300mg/kg 60-90 min beforeBuffers blood pH, delaying fatigue in high-intensity endurance efforts. GI discomfort is the limiting factor
Buy on Amazon →Sample Daily Stack
Daily: Beta Alanine (3.2g split doses) + Iron (if needed) — load for 4 weeks
Race day minus 3h: Carb-rich meal
Race day minus 90min: Sodium Bicarbonate (200mg/kg) in water (test in training first)
Race day minus 60min: Beetroot shot + Caffeine (3-6mg/kg)
During: Electrolytes + Carbohydrates (60-90g/hour for efforts >90min)
Lifestyle Tips
Periodise nutrition — train low (carb) occasionally, race high (carb loaded)
Practice race nutrition in training — never try anything new on race day
Build aerobic base with Zone 2 training (80% of volume)
Address iron status proactively — test ferritin every 3-6 months
Altitude or heat acclimatisation provides additional endurance benefits
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Try Huel →This information is for educational purposes only and does not constitute medical advice. Supplement recommendations are based on published research but individual needs vary. Always consult a qualified healthcare professional before starting any supplement regimen. Amazon links are affiliate links.