Topic
Every study covered on this subject, newest first.
Twenty four healthy adults took nitrate rich or nitrate stripped beetroot, with and without caffeine. Caffeine alone raised two measures of arterial stiffness. Taken together with the nitrate rich drink, those measures sat at placebo levels.
Food and Function · McLellan et al. · Loughborough University · 25 August 2026 · PMID 42639731
Sixty grams of maltodextrin during hard intervals cut muscle glycogen use by about 40 percent and left the liver untouched. Adding caffeine and four other actives cancelled the sparing, because the riders simply went harder.
American Journal of Physiology · Hannon et al. · Manchester Metropolitan University · 4 August 2026 · PMID 42552237
Pooling 26 crossover trials in female team sport athletes, caffeine produced a small edge in sprinting, jumping and change of direction, and made hard efforts feel easier. Skill based and cognitive outcomes showed nothing reliable, and no dose, timing or format pattern held up.
Nutrients · Li et al. · Henan Sport University · 24 July 2026 · PMID 42588052
Endurance trained men who took a ketone monoester alongside caffeine before 90 minutes of loaded walking in the heat lasted 8.9 minutes in a following run to exhaustion, against 7.0 minutes on an energy matched carbohydrate drink, and held their accuracy on the easier of two working memory tasks. Core temperature and heart rate were the same either way.
Journal of the International · Lints et al. · University of South Carolina · 16 July 2026 · PMID 42460838
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