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.
| topic | claim | evidence level | citation | source |
|---|---|---|---|---|
| Caffeine Focus Randomized Trial | Results 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. | 2 | Thomas 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 Trial | Conclusion 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. | 2 | Thomas 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 Trial | Background Interest is increasing in natural, plant-based, food-grade nootropics that deliver sustained cognitive benefits without adverse effects. | 2 | Thomas 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 Trial | Caffeine remains the most widely consumed psychoactive substance, owing to its rapid, short-term enhancement of wakefulness, alertness, and overall performance. | 2 | Thomas 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 Trial | Results 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). | 2 | Bingol Diedhiou A (2026) | Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study. |
| Caffeine Focus Randomized Trial | Caffeine alone and paraxanthine alone did not show clear evidence of performance improvement in this sample, although estimates favored both conditions versus placebo. | 2 | Bingol Diedhiou A (2026) | Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study. |
| Caffeine Focus Randomized Trial | Conditions containing caffeine were associated with poorer subjective sleep quality, whereas paraxanthine alone showed more favorable sleep-related outcomes. | 2 | Bingol Diedhiou A (2026) | Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study. |
| Caffeine Focus Randomized Trial | Background 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. | 2 | Bingol Diedhiou A (2026) | Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study. |
Source documents
- 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.
- Comparative effects of caffeine and paraxanthine on rowing performance and sleep quality: a randomized crossover study.