Herb Profile
Guarana
Botanical profile with evidence, safety, and practical fit.
Last reviewed: •3 human studies cited
C PreliminaryUse extra caution — Caffeine exposure can cause insomnia, anxiety, tremor, tachycardia, blood pressure elevation, and GI upset. Details
- Evidence
- Strong Human Evidence
- Typical onset
- Varies by prep
- Safety rating
- High caution
- Best for
- Anti Inflammatory, Antioxidant, Energy, Stress resilience
- Avoid / review if
- Uncontrolled Hypertension, Arrhythmia, Severe Anxiety/Insomnia
Monograph visual
Guarana
The Hippie Scientist
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Safety & Cautions
Caffeine exposure can cause insomnia, anxiety, tremor, tachycardia, blood pressure elevation, and GI upset. Avoid stacking with energy drinks or other stimulants; use cautiously in pregnancy/breastfeeding and cardiovascular disease.
28%
High caution — review carefully
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- - Uncontrolled Hypertension
- - Arrhythmia
- - Severe Anxiety/Insomnia
- - Stimulant Sensitivity
- - And Unsupervised Pediatric Use.
- - Additive Effects With Caffeine
- - Stimulants
- - Theophylline
- - Decongestants
- - And Some ADHD Medications
Safety classifications
- - Stimulant-Like Profile: Stimulant-like or activating caution language is present.
- - Pregnancy/Breastfeeding Caution: Pregnancy or breastfeeding caution language is present.
Full safety note
- - Caffeine exposure can cause insomnia, anxiety, tremor, tachycardia, blood pressure elevation, and GI upset. Avoid stacking with energy drinks or other stimulants; use cautiously in pregnancy/breastfeeding and cardiovascular disease.
Safety labels
- - Stimulant-Like Profile
- - Pregnancy/Breastfeeding Caution
Evidence-based safety
Caution when combined
These pairings share a flagged risk mechanism. They are additive-effect cautions derived from contraindication data, not confirmed clinical interactions. Consult a clinician before combining.
Moderate Caution
81 flagged pairingsBlood-pressure effects
Moderate Caution
81 flagged pairingsBlood-pressure effects
Browse the grouped cautions below. The list scrolls inside this card when long.
Blood-pressure effects
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Evidence Summary
Evidence lens
Most useful for practical interpretation when safety context also fits.
StrongStrong Human Evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Inflammatory Signaling Modulation · Oxidative Stress Modulation
Research maturity: Preliminary or mixed — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — Caffeine exposure can cause insomnia, anxiety, tremor, tachycardia, blood pressure elevation, and GI upset.
This profile cites 3 human studies.
How evidence grades work
Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.
A
Strong
Multiple RCTs, consistent direction, adequate effect size
B
Moderate
Some RCTs or consistent observational data in humans
C
Preliminary / Mixed
Animal or in-vitro only, or conflicting human data
D
Traditional / Theoretical
Traditional use only; no controlled human trials
Clinical Study Summaries (3)Cited studies informing this profile. RCTs and reviews shown first.
| Study | Type | Sample | Source |
|---|---|---|---|
Effects of the consumption of guarana on human health: A narrative review Torres EAFS et al. (2022) | — | — | PubMed → |
The Use and Impact of Cognitive Enhancers among University Students: A Systematic Review Sharif S et al. (2021) | — | — | PubMed → |
International society of sports nutrition position stand: energy drinks and energy shots Jagim AR et al. (2023) | — | — | PubMed → |
Dosing & Timing
Dose guidance
Preparation specific; use standardized product label for Use standardized preparations that disclose caffeine content and require source backed dosage review before therapeutic claims.
How Guarana Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Guarana Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & Biological Pathways
Preclinical pathways
Proposed mechanisms from in vitro and animal research; these do not confirm clinical outcomes in humans.
Inflammatory Signaling ModulationOxidative Stress Modulation
Active Compounds
Key constituents studied in Guarana, with full pharmacology and safety profiles.
Condition guides
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Review available sources for Guarana
Independent database mapping — evaluated separately from safety and efficacy scores.
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Safety first · Harm reduction
This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.
Learn how we evaluate confidence, safety, and intensity on the methodology page.
Editorial Review
Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.
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Botanical profile context
How to interpret Guarana
Guarana dosage ranges, effects, drug interactions, and harm-reduction safety guide for anti inflammatory. Strong Human Evidence research evidence. Use this herb profile as a starting point for evidence review, not as a recommendation to start a new supplement. Botanical products can vary by plant part, extract ratio, standardization, dose, and contaminant testing, so two labels with the same common name may not behave the same way.
When reviewing Guarana, compare the traditional-use context against the human evidence, mechanism notes, and safety cautions. Pay special attention to pregnancy, breastfeeding, liver or kidney disease, blood-pressure effects, sedation, stimulation, anticoagulant use, antidepressants, and any prescription medication overlap.
For product decisions, prefer transparent labels, named extracts, clear serving sizes, and third-party quality testing. Avoid treating a long list of possible mechanisms as proof that an herb will solve a specific condition.