# Caffeine Mental Fatigue Randomized Trial: What the Evidence Says
Canonical: https://www.migaku.app/guides/caffeine-mental-fatigue-randomized-trial-evidence-review
Category: evidence-review
Summary: Caffeine Mental Fatigue Randomized Trial has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass ar
Last reviewed: 2026-08-19
Reviewed by: Migaku Evidence Review
# Caffeine Mental Fatigue Randomized Trial: What the Evidence Says

## Quick Answer

Caffeine Mental Fatigue Randomized Trial has 2 source documents in the current Migaku evidence database. The strongest available sources in this first pass are mixed biomedical and public-health sources, so conclusions should be framed as evidence-aware guidance rather than medical advice.

## Key Takeaways

- This page is generated only from sources stored in the Migaku evidence knowledge base.
- Current evidence mix: 1 preclinical study, 1 research article.
- Claims should be interpreted with the source type, study design, population, and publication date in mind.
- This article is educational and does not replace care from a qualified clinician.

## Evidence Map

| Source | Evidence type | Level | Date | Identifier |
| --- | --- | ---: | --- | --- |
| Dietary interventions interact with the perception of effort and enhance endurance performance: a brief narrative review | preclinical study | 4 | 2026-06-24 | 10.1080/15502783.2026.2692003 |
| Differential effects of caffeine, acute aerobic exercise, and placebo on mental fatigue | research article | 4 | 2026-04-30 | 10.1371/journal.pone.0348279 |

## What The Sources Report

- Individual exercise tolerance is defined as the amount of physical exertion that can be sustained before task disengagement and can be increased through appropriate training strategies. [Strasser Barbara (2026); evidence level 4]
- We then integrate evidence on the ergogenic effects of various dietary interventions with existing knowledge on perception of effort, focusing on how these interventions may limit the development of fatigue during endurance exercise and thereby influence effort perception. [Strasser Barbara (2026); evidence level 4]
- Accruing mental fatigue through sustained mental activity can be specifically defined as "a gradual and cumulative process … associated with a disinclination for any effort, a general sensation of weariness, feelings of inhibition and impaired mental performance, reduced efficiency and alertness". [Shirzad Ali (2026); evidence level 4]
- Though fatigue is widely accepted as a part of daily life, it has been associated with several unwanted outcomes. [Shirzad Ali (2026); evidence level 4]

## How To Read This Evidence

Evidence level 1 generally reflects systematic reviews or meta-analyses. Level 2 includes randomized trials, guidelines, or public-health guidance. Level 3 usually reflects observational or narrative-review evidence. Level 4 is weaker or early-stage evidence. The level is a sorting aid, not a final quality grade.

## Practical Interpretation

For caffeine mental fatigue randomized trial, the current source set is useful for orientation, but it is not yet broad enough for strong claims. Use cautious language and keep conclusions close to the cited sources.

## Limits Of This First Pass

This is a small-batch MVP article. It uses the first ingested sources for this topic and should be expanded with more targeted searches, license review, and human editorial checks before being treated as a definitive review.

## References

- Strasser Barbara (2026). Dietary interventions interact with the perception of effort and enhance endurance performance: a brief narrative review. DOI: 10.1080/15502783.2026.2692003. PMCID: PMC13295106. PMID: 42338317. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC13295106/
- Shirzad Ali (2026). Differential effects of caffeine, acute aerobic exercise, and placebo on mental fatigue. DOI: 10.1371/journal.pone.0348279. PMCID: PMC13132226. PMID: 42060683. License: CC BY 4.0. https://pmc.ncbi.nlm.nih.gov/articles/PMC13132226/

## Safety Note

Health information can change, and individual risk depends on medical history, medications, pregnancy status, age, and diagnosis. Talk with a qualified clinician before changing treatment, supplement, or medication routines.