evidence table

Caffeine Focus Randomized Trial Evidence Table

Structured evidence table for Caffeine Focus Randomized Trial, generated from 2 reusable source documents in the Migaku knowledge base.

topicclaimevidence levelcitationsource
Caffeine Focus Randomized TrialResults MA2-24 significantly improved reaction time, accuracy, and error rate in the Shifting Attention Test and increased correct responses while reducing errors in the Symbol Digit Coding Test.2Thomas JV (2026)A full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
Caffeine Focus Randomized TrialConclusion The results indicate that black cardamom fruit extract MA2-24 exhibits nootropic properties across multiple domains of attention, working memory, and processing speed to support cognitive flexibility and executive function.2Thomas JV (2026)A full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
Caffeine Focus Randomized TrialBackground Interest is increasing in natural, plant-based, food-grade nootropics that deliver sustained cognitive benefits without adverse effects.2Thomas JV (2026)A full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
Caffeine Focus Randomized TrialCaffeine remains the most widely consumed psychoactive substance, owing to its rapid, short-term enhancement of wakefulness, alertness, and overall performance.2Thomas JV (2026)A full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
Caffeine Focus Randomized TrialResults Compared with the placebo, the combined caffeine + paraxanthine condition was associated with faster 2000-m performance and higher mean power output ( p = 0.044; Cohen's d = 0.30).2Bingol Diedhiou A (2026)Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
Caffeine Focus Randomized TrialCaffeine alone and paraxanthine alone did not show clear evidence of performance improvement in this sample, although estimates favored both conditions versus placebo.2Bingol Diedhiou A (2026)Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
Caffeine Focus Randomized TrialConditions containing caffeine were associated with poorer subjective sleep quality, whereas paraxanthine alone showed more favorable sleep-related outcomes.2Bingol Diedhiou A (2026)Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
Caffeine Focus Randomized TrialBackground Although caffeine is widely used in athletes due to its ergogenic effects, the effects of its main metabolite, paraxanthine, on performance and sleep have not been adequately investigated.2Bingol Diedhiou A (2026)Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
topicCaffeine Focus Randomized Trial
claimResults MA2-24 significantly improved reaction time, accuracy, and error rate in the Shifting Attention Test and increased correct responses while reducing errors in the Symbol Digit Coding Test.
evidence level2
citationThomas JV (2026)
sourceA full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
topicCaffeine Focus Randomized Trial
claimConclusion The results indicate that black cardamom fruit extract MA2-24 exhibits nootropic properties across multiple domains of attention, working memory, and processing speed to support cognitive flexibility and executive function.
evidence level2
citationThomas JV (2026)
sourceA full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
topicCaffeine Focus Randomized Trial
claimBackground Interest is increasing in natural, plant-based, food-grade nootropics that deliver sustained cognitive benefits without adverse effects.
evidence level2
citationThomas JV (2026)
sourceA full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
topicCaffeine Focus Randomized Trial
claimCaffeine remains the most widely consumed psychoactive substance, owing to its rapid, short-term enhancement of wakefulness, alertness, and overall performance.
evidence level2
citationThomas JV (2026)
sourceA full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
topicCaffeine Focus Randomized Trial
claimResults Compared with the placebo, the combined caffeine + paraxanthine condition was associated with faster 2000-m performance and higher mean power output ( p = 0.044; Cohen's d = 0.30).
evidence level2
citationBingol Diedhiou A (2026)
sourceComparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
topicCaffeine Focus Randomized Trial
claimCaffeine alone and paraxanthine alone did not show clear evidence of performance improvement in this sample, although estimates favored both conditions versus placebo.
evidence level2
citationBingol Diedhiou A (2026)
sourceComparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
topicCaffeine Focus Randomized Trial
claimConditions containing caffeine were associated with poorer subjective sleep quality, whereas paraxanthine alone showed more favorable sleep-related outcomes.
evidence level2
citationBingol Diedhiou A (2026)
sourceComparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.
topicCaffeine Focus Randomized Trial
claimBackground Although caffeine is widely used in athletes due to its ergogenic effects, the effects of its main metabolite, paraxanthine, on performance and sleep have not been adequately investigated.
evidence level2
citationBingol Diedhiou A (2026)
sourceComparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.

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Source documents

  1. A full-spectrum aqueous extract of black cardamom (<i>Amomum subulatum</i>) improves focus/alertness and executive function: a randomized, double-blinded, placebo- and active-controlled, comparative study in healthy working-class participants.
  2. Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.