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Bio-Analyst

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Tier-APublic-ready6/19/2026

Caffeine

Exercise performance and recovery is the main area connected here, and any felt benefit should be read together with the human evidence base.

Some human supplement-context evidence is present and directly informs the score.

Representative tier calculated from paper evidence that passed the collection audit.

Papers analyzed
40
Caution signal
Low
Representative score
84.6
Exercise performance and recoveryCognition, memory, and focusStress Response and Sleep Changes

Main benefit evidence

The representative ingredient tier is calculated from these target-level evidence groups.

Exercise performance and recovery
16 studiesTier-S
Exercise performance and recovery
Fairly consistent positive signal in studiesFelt benefit focusSupplement context
Potential benefit studied in Exercise performance and recovery.
Open metrics
>
Exercise performance and recovery
No direct rate reported. Read direction and evidence strength together.
Evidence score
85.0
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Cognition and focus
2 studiesTier-B
Cognition, memory, and focus
Fairly consistent positive signal in studiesFelt benefit focusSupplement context
Potential benefit studied in Cognition and focus.
Open metrics
>
Cognition, memory, and focus
No direct rate reported. Read direction and evidence strength together.
Evidence score
58.0
Score reflects signal strength. Tier also considers paper count, repetition, and study context.
Stress and mood
1 studiesTier-C
Stress Response and Sleep Changes
Some positive signal observedFelt benefit focusSupplement context
These findings come from stress response, cortisol, anxiety, or sleep outcomes. They may mix felt benefits with physiological markers.
Open metrics
>
Stress and mood balance
No direct rate reported. Read direction and evidence strength together.
Evidence score
36.8
Score reflects signal strength. Tier also considers paper count, repetition, and study context.

Recent research

Updated This Month10 new papers

10 new papers were added in this period. No new risk signal was identified.

What's new

10 new papers were added.No new risk signal was identified.

Most notable recent finding

This is the most meaningful new study in the latest update.
review
Why it mattersIt ranked highest among the newly collected papers for this ingredient in the latest update.
View paper

Study dosage range (reference only)

Lower dose
2
mg/kg
Higher dose
9
mg/kg
Dosages used in research papers, shown as reference context.
Not personal dosing instructions, recommendations, or safety limits.

Key cautions to review

Standalone side-effect signals and combination cautions are listed separately.

Caution index
0.8
Caution band: Low
Caution signals
1
Side effects + combos + curated rules
Key precautions
No combination caution signal is clear enough to show right now. This does not guarantee safety.
Standalone side effects, combination cautions, and positive combos are separated below.

Combination caution signals

! Obeticholic acidOCA showed weak interactions with caffeine, a CYP1A2 probe substrate, suggesting minor metabolic modulation.

Evidence summaries

Paper IDs and full lists are private. Only study types and summaries are shown.

Key Evidence #1
Public scholarly dataCitation signal: 387
review

The evidence generally supports that consumption of up to 400 mg caffeine/day in healthy adults is not associated with overt, adverse cardiovascular effects, behavioral effects, reproductive and developmental effects, acute effects, or bone status and a shift

Key Evidence #2
Public scholarly dataCitation signal: 307
review

It is suggested that caffeine ingestion improves exercise performance in a broad range of exercise tasks and the magnitude of the effect of caffeine is generally greater for aerobic as compared with anaerobic exercise.

Key Evidence #3
Public scholarly dataCitation signal: 81
observational

A single and moderate dose of caffeine, ingested 5–60 min before a soccer practice, might produce valuable improvements in certain abilities related to enhanced soccer physical performance, however, caffeine does not seem to cause increased markers of muscle d

3 more summariesLimited representative sample by study type.
>
Public scholarly dataCitation signal: 77
observational

Low-doses of E GCG and caffeine used in combination led to synergistic anti-obesity effects equivalent to those of high-dose EGCG, and combination treatment exhibited a synergistic effect on altering gut microbiota, including decreased Firmicutes level and inc

Public scholarly dataCitation signal: 74
observational

It is shown that eicosanoyl-5-hydroxytryptamide, which was purified from coffee as an agent that leads to enhanced enzymatic activity of the specific phosphatase PP2A that dephosphorylates the pathogenic protein α-synuclein, works in synergy with caffeine in p

Public scholarly dataCitation signal: 71
observational

[Abstract]: Caffeine used as a supplement has been shown to improve physical and cognitive performance in several sport modalities due to its effects on the central nervous system. This review assesses the direct effects of caffeine supplementation on performa

Caffeine
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