Research shows that caffeine, nitrate supplements, and green tea extract all improve shooting accuracy in esports athletes after mental fatigue, according to a 2026 randomized controlled trial of 20 professional FPS players. Caffeine and nitrate also boosted aim stability. However, Gram Research analysis found these supplements provided no additional benefit beyond rest for spatial awareness or multitasking abilities, suggesting their effects are limited to specific cognitive skills rather than overall mental recovery.
A new study tested whether popular supplements like caffeine and energy drinks could help professional video game players recover their focus and accuracy after mental exhaustion. Researchers had 20 top esports athletes complete a tiring mental task, then gave them different supplements or a placebo before testing their gaming skills. According to Gram Research analysis, caffeine, nitrate-based supplements, and green tea extract all improved shooting accuracy compared to placebo, while caffeine and nitrate also boosted aim stability. However, the supplements didn’t help with spatial awareness or multitasking abilities any better than just resting. The findings suggest some supplements may offer modest benefits for competitive gaming performance after mental fatigue.
Key Statistics
A 2026 randomized controlled trial of 20 professional esports athletes found that caffeine, nitrate, and green tea extract all significantly improved shooting accuracy after mental fatigue compared to placebo (p < 0.05).
According to the same study, caffeine and nitrate supplements also improved shooting stability (aim steadiness) in esports athletes recovering from mental fatigue, while Ginkgo biloba did not show significant benefits.
Research reviewed by Gram found that none of the four tested supplements—caffeine, nitrate, Ginkgo biloba, or green tea extract—provided additional recovery benefits for spatial localization or multitasking ability beyond natural rest.
The 2026 study showed that heart rate variability measurements changed under some supplement conditions, indicating supplements affected nervous system recovery, though the practical significance for gaming performance remains unclear.
The Quick Take
- What they studied: Whether different nutritional supplements (caffeine, nitrate, Ginkgo biloba, green tea extract) could help esports players recover their gaming skills after experiencing mental fatigue.
- Who participated: Twenty highly skilled professional esports athletes who play first-person shooter games like competitive Call of Duty or Counter-Strike. All were experienced competitive players.
- Key finding: All four supplements improved shooting accuracy after mental fatigue compared to placebo (p < 0.05). Caffeine, nitrate, and green tea extract also improved aim stability. However, supplements didn’t provide extra benefits beyond rest for spatial awareness or multitasking.
- What it means for you: If you’re a competitive esports player, caffeine or nitrate supplements might give you a small edge in accuracy and aim stability after intense mental effort. However, these supplements won’t help with other important skills like map awareness or decision-making. Simple rest may be just as effective for some abilities.
The Research Details
Researchers used a crossover design, meaning each of the 20 esports athletes tried all five conditions: caffeine, nitrate supplement, Ginkgo biloba extract, green tea catechins, and placebo. First, they made the athletes mentally tired using a Stroop task—a challenging test where you read color words printed in different colors, which confuses your brain. After the mental fatigue task, each athlete took one supplement and rested for 60 minutes. Then they played through a series of gaming tests measuring shooting accuracy, aim stability, spatial awareness, and multitasking ability using professional esports training software (KovaaK’s). Researchers also measured heart rate variability (HRV)—how much the time between heartbeats varies—to see if supplements affected the nervous system’s recovery.
This study design is strong because each athlete served as their own control, meaning researchers could compare how the same person performed under different conditions. This reduces confusion from individual differences. Testing real esports athletes with actual competitive skills makes the results more relevant to professional gaming than testing casual players. Measuring both performance and nervous system changes provides insight into how supplements might work.
The study was published in a respected sports nutrition journal and used randomized conditions to reduce bias. The crossover design is scientifically rigorous. However, the sample size of 20 athletes is relatively small, which means results should be confirmed with larger studies. The study only tested one 60-minute recovery period, so we don’t know if effects last longer or if repeated use changes outcomes.
What the Results Show
All four supplements—caffeine, nitrate, Ginkgo biloba, and green tea extract—significantly improved shooting accuracy after mental fatigue compared to placebo. This was the study’s clearest finding. For shooting stability (how steady your aim is), caffeine, nitrate, and green tea extract all showed improvements, while Ginkgo biloba did not. Interestingly, the three effective supplements performed similarly to each other, suggesting they may work through different mechanisms but achieve comparable results. The improvements appeared within the 60-minute recovery window after supplement ingestion.
For spatial localization (knowing where things are on the map) and multitasking ability (handling multiple game elements simultaneously), none of the supplements provided benefits beyond what simple rest provided. This suggests that mental fatigue affects different cognitive skills differently, and supplements may only help with certain types of performance. Heart rate variability measurements showed changes under some supplement conditions, indicating the supplements did affect the nervous system’s recovery process, though the practical significance of these changes remains unclear.
Previous research has shown that caffeine improves focus and reaction time in various tasks, so this finding aligns with existing knowledge. However, this is one of the first studies specifically examining how supplements affect esports performance after mental fatigue. The finding that not all cognitive abilities recover equally with supplementation is new and suggests that supplement benefits are more targeted than previously thought. The lack of effect on multitasking and spatial awareness contradicts some general cognitive enhancement claims made in marketing.
The study only included 20 athletes, which is a small sample size that may not represent all esports players. All participants were high-level FPS game players, so results may not apply to other game types like strategy games or fighting games. The study only measured recovery over 60 minutes, so we don’t know about longer-term effects or whether benefits persist with repeated use. The mental fatigue was induced artificially using a Stroop task rather than actual competitive gaming, which may not perfectly replicate real match fatigue. Individual differences in supplement metabolism weren’t measured, so some athletes may benefit more than others.
The Bottom Line
For competitive esports athletes experiencing mental fatigue: Caffeine (moderate confidence) and nitrate supplements (moderate confidence) appear to modestly improve shooting accuracy and aim stability. Green tea extract shows similar benefits (moderate confidence). Ginkgo biloba showed less consistent benefits (low confidence). These supplements should not replace adequate sleep, nutrition, and rest. They appear most useful as a short-term tactical tool during tournaments or intense practice sessions, not as a substitute for recovery fundamentals.
Professional and semi-professional esports athletes competing in FPS games should consider these findings. Casual gamers seeking to improve performance may see minimal practical benefit. Athletes with heart conditions, caffeine sensitivity, or those taking medications should consult a doctor before using these supplements. These findings don’t apply to non-competitive gaming or other esports genres.
Benefits appeared within 60 minutes of supplement ingestion in this study. Realistic expectations: a small improvement in accuracy and aim stability, not a game-changing advantage. Effects are likely temporary and tied to the supplement’s active period. Long-term benefits require further research.
Frequently Asked Questions
Do energy drinks help esports players perform better after getting mentally tired?
Caffeine-based energy drinks improved shooting accuracy and aim stability in professional esports athletes after mental fatigue, according to a 2026 study. However, benefits were modest and didn’t help with map awareness or decision-making. Rest alone provided similar benefits for some skills.
What supplements work best for esports performance recovery?
Caffeine, nitrate supplements, and green tea extract showed the most consistent benefits for shooting accuracy and aim stability. All three performed similarly. Ginkgo biloba was less effective. Individual responses vary, so testing personal tolerance is important.
How long does it take for supplements to help esports players recover from mental fatigue?
In the study, benefits appeared within 60 minutes of taking the supplement. Effects were measured during competitive gaming tasks performed at this timepoint. Longer-term effects beyond 60 minutes weren’t studied.
Can supplements replace sleep and rest for esports athletes?
No. Supplements showed modest improvements in specific skills but shouldn’t replace adequate sleep, nutrition, and recovery time. They appear most useful as tactical tools during tournaments, not as substitutes for fundamental recovery practices.
Do these supplements help with all esports games or just shooter games?
This study only tested first-person shooter games. Results may not apply to strategy games, fighting games, or other esports genres, which require different cognitive skills. Additional research is needed for other game types.
Want to Apply This Research?
- Log supplement type, timing, and dosage before competitive sessions, then track shooting accuracy percentage and aim stability scores from practice or matches within 60-120 minutes post-supplementation to identify personal response patterns.
- Users can set reminders to take their chosen supplement 60 minutes before competitive matches or intense practice sessions, then use in-app performance metrics to compare their accuracy and stability scores on supplemented versus non-supplemented days.
- Create a 4-week tracking period comparing performance metrics across all five conditions (four supplements plus placebo) using a rotating schedule. Track shooting accuracy, aim stability, and subjective mental clarity. Identify which supplement, if any, provides the most consistent personal benefit.
This research examines supplement effects in a controlled laboratory setting with a small sample of professional esports athletes. Results may not apply to all individuals or gaming contexts. Supplements are not regulated by the FDA in the same way as medications. Consult a healthcare provider before starting any supplement regimen, especially if you have underlying health conditions, take medications, or are sensitive to caffeine. This article is for informational purposes and should not replace professional medical advice. Individual responses to supplements vary significantly.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.
