Herb Profile
Guayusa
Botanical profile with evidence, safety, and practical fit.
Last reviewed: •3 human studies cited
C PreliminaryUse extra caution — Caffeine containing herb; may worsen insomnia, anxiety, palpitations, reflux, and blood pressure in sensitive users. Details
- Evidence
- Limited Human Evidence
- Typical onset
- Varies by prep
- Safety rating
- High caution
- Best for
- Antioxidant, Stress resilience
- Avoid / review if
- Uncontrolled Hypertension, Arrhythmia, Severe Anxiety/Insomnia
Monograph visual
Guayusa
Generated profile category visual
Where to go next — guides & comparisons
Continue reading
- If you want to browse more herbs → All herbs
Safety & Cautions
Caffeine containing herb; may worsen insomnia, anxiety, palpitations, reflux, and blood pressure in sensitive users.
28%
High caution — review carefully
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- - Uncontrolled Hypertension
- - Arrhythmia
- - Severe Anxiety/Insomnia
- - Pregnancy/Breastfeeding Caution
- - And Stimulant Sensitivity.
- - Additive Effects With Caffeine
- - Stimulants
- - Theophylline
- - Decongestants
- - And Stimulant 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 containing herb; may worsen insomnia, anxiety, palpitations, reflux, and blood pressure in sensitive users.
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
- Agmatine sulfate
- ajoene
- Allicin
- American Ginseng Extract
- Andrographis
- Angelica Dahurica
- Astaxanthin
- Astragalus Membranaceus
- Beetroot extract
- Berberis
- Bicarbonate
- Black Seed
- Black Seed Oil
- Brassica Oleracea
- Buckwheat
- Caffeine
- Capsicum
- Caraway
- Chuanxiong
- Citicoline
- Citrus Bergamia
- Cnidium Monnieri
- Coenzyme Q10
- Coffee Cherry
- Coleus Forskohlii
- Hawthorn
- crocetin
- crocin
- Crocus Sativus
- Cymbopogon Citratus
- Dandelion
- Danshen
- Dendrobium
- Devils Claw Extract
- Electrolyte Mix
- Sodium electrolytes
- Eleuthero
- EGCG
- Epimedium
- Epimedium Brevicornum
- Eucommia
- ferulic acid
- forskolin
- Garlic Extract
- Gastrodia
- Panax Red Ginseng
- Panax White Ginseng
- Glycyrrhiza Glabra
- Guarana
- Hibiscus
- Huperzia Serrata
- L-Tyrosine
- Lemongrass
- Licorice
- Ligusticum Chuanxiong
- Lobelia Inflata
- Luo Han Guo
- Moringa
- Mucuna
- Myristica Fragrans
- Nettle Root
- Nicotiana Glauca
- Nicotiana Tabacum
- Nigella Sativa
- Nicotinamide Mononucleotide
- Notoginseng
- Olive Leaf
- Olive Leaf Extract
- Panax Ginseng Extract
- Parsley
- Poria
- PT-141 (Bremelanotide)
- Punarnava
- Quercetin Phytosome
- Saffron Extract
- Sodium
- Soursop
- Ashwagandha
- Yerba Mate
- Yohimbe
- Yohimbine
Evidence Summary
Evidence lens
Early signal that needs stronger human replication before practical claims.
PreliminaryLimited Human Evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Oxidative Stress Modulation
Research maturity: Preliminary or mixed — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — Caffeine containing herb; may worsen insomnia, anxiety, palpitations, reflux, and blood pressure in sensitive users.
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
Dosing & Timing
Dose guidance
Preparation specific; use standardized product label for Use moderate brewed preparations or products with disclosed caffeine content and require source backed dosage review before therapeutic claims.
How Guayusa Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Guayusa 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.
Oxidative Stress Modulation
Active Compounds
Key constituents studied in Guayusa, with full pharmacology and safety profiles.
Condition guides
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Review available sources for Guayusa
Independent database mapping — evaluated separately from safety and efficacy scores.
Affiliate Disclosure: Shopping links may earn this site a commission at no cost to you. Links are chosen on quality and availability, never commission tiers; safety warnings and evidence ratings stay independent.
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.
Free safety checklist
Get the Guayusa research notes
Evidence summaries, dosing context, and safety updates for this herb — straight to your inbox.
We use your email to send the checklist and occasional evidence-first supplement updates. Unsubscribe anytime. Privacy policy.
Botanical profile context
How to interpret Guayusa
Guayusa dosage ranges, effects, drug interactions, and harm-reduction safety guide for antioxidant. Limited 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 Guayusa, 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.