Performance · INGREDIENT PROFILE
Caffeine
Research topics: Endurance · Alertness · Exercise performance
Also searched as: caffeine, caffeine anhydrous. Names and formulations are not necessarily interchangeable.
01 / MATCH THE FORMULA
The details to pin down.
Ingredient identity & form
Record total caffeine from every ingredient and whether the study used a beverage, capsule, or combination.
Dose, duration & study fit
Milligrams per serving, body-weight-adjusted dose if used, timing, habitual intake, and sleep context.
Record the tested dose from the original study. A study dose is not a recommended dose or proof that every claim at that dose is supported.
02 / READ IN CONTEXT
What changes the interpretation?
Compare the actual performance task and usual caffeine intake. A change in alertness is a different endpoint from endurance.
Selected-source perspective
Research supports endurance benefits in some exercise settings.
Potential adverse effects and individual variability belong in the assessment. This is not a personal dose recommendation.
Read the cited guidance or review ↗- Population: Does the study population match your intended audience?
- Comparison: What changed compared with the control group—not just compared with baseline?
- Consistency: Do independent studies agree? Include null findings, limitations, and adverse events.
- Claim wording: Does the measured outcome support the strength and scope of the proposed claim?
03 / FOLLOW THE SOURCES
Research to explore.
A selected index of randomized trials and research reviews. Open the source to verify methods, results, corrections, and applicability.
2026 · Randomized Controlled Trial
Consumption of caffeine-containing beverages improves sustained attention and alertness but has no effect on strength or static muscular endurance. ↗
PMID 42559121 · DOI 10.1017/jns.2026.10122 · PMC record available
2026 · Randomized Controlled Trial
The Effect of CYP1A2 Gene Polymorphisms on Caffeine Pharmacokinetics and Exercise Performance in Male Recreational Athletes. ↗
PMID 42230302 · DOI 10.1002/ejsc.70203 · PMC record available
2026 · Systematic Review · systematic-review
Acute caffeine supplementation and resistance exercise performance in female participants: a systematic review and three-level meta-analysis. ↗
PMID 42591203 · DOI 10.3389/fphys.2026.1892370 · PMC record available
2026 · Meta-Analysis · Systematic Review
Dose-Response Effect of Oral Caffeine Use on Aerobic Exercise Performance: A Systematic Review and Meta-Analysis. ↗
PMID 42356375 · DOI 10.3390/nu18121989
How these references were selected
First four Europe PMC relevance-ranked MED records matching the recorded ingredient/outcome query and randomized-trial, systematic-review or meta-analysis publication types. No favorable-result filter. Bibliographic discovery only; not a full-text review or exhaustive bibliography.
Captured 2026-10-08: 4 records shown from 403 matching index records. Index counts describe this query, not supporting studies or evidence quality.
(TITLE_ABS:"caffeine") AND (TITLE_ABS:"endurance" OR TITLE_ABS:"exercise performance" OR TITLE_ABS:"alertness") AND SRC:MED AND (PUB_TYPE:"Randomized Controlled Trial" OR PUB_TYPE:"Systematic Review" OR PUB_TYPE:"Meta-Analysis")Run the recorded index search ↗04 / GO DEEPER
Guidance & source databases.
NIH ODS: Exercise and athletic performance↗Database links open a fresh search. Registry entries can identify ongoing or unpublished trials; registration alone is not evidence of benefit.
Educational research navigation. Not individual medical advice, a safety clearance, regulatory approval, or a complete review of this ingredient. Bibliographic snapshot: 2026-10-08.