Herb Profile
Damiana
Turnera diffusa
Damiana (Turnera diffusa) carries a Grade C rating — limited evidence.
Last reviewed: •3 sources citedReport a correctionProfile-wide ·C Limited
Use extra caution — Human evidence is limited. Details
- Evidence
- Limited Evidence
- Typical onset
- Varies by prep
- Safety rating
- High caution
- Best for
- Libido, Mood Support, Nervous System, Stress
- Avoid / review if
- Pregnancy/Breastfeeding, Seizure Disorder Without Clinician Review, Planned Surgery Or Complex Psychiatric Medication Regimens.
Safety
Safety & Cautions
Human evidence is limited. Use conservative dosing; avoid stacking with sedatives, stimulants, or sexual performance products without review.
High caution
Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.
- Interaction-AwareMedication or interaction context is explicitly noted.
- Stimulant-Like ProfileStimulant-like or activating caution language is present.
- Pregnancy/Breastfeeding CautionPregnancy or breastfeeding caution language is present.
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- Pregnancy/Breastfeeding
- Seizure Disorder Without Clinician Review
- Planned Surgery Or Complex Psychiatric Medication Regimens.
- Potential Additive CNS Effects With Sedatives
- Alcohol
- Anxiolytics
- And Serotonergic Or Stimulant Stacks
- Diabetes Medication Caution Is Theoretical.
Safety classifications
- Interaction-Aware: Medication or interaction context is explicitly noted.
- Stimulant-Like Profile: Stimulant-like or activating caution language is present.
- Pregnancy/Breastfeeding Caution: Pregnancy or breastfeeding caution language is present.
Full safety note
- Human evidence is limited. Use conservative dosing; avoid stacking with sedatives, stimulants, or sexual performance products without review.
Safety labels
- Interaction-Aware
- Stimulant-Like Profile
- Pregnancy/Breastfeeding Caution
Evidence-based safety
Caution when combined
Severity and certainty are shown separately. A high-priority caution can still be theoretical: these pairings are screened from shared contraindication mechanisms and are not automatically documented clinical interactions. Provenance identifies the source fields that produced each flag; it does not upgrade the certainty of the pairwise claim.
High-Priority Caution
173 flagged pairingsSerotonergic activity · Bleeding / anticoagulant risk
High-Priority Caution
173 flagged pairingsSerotonergic activity · Bleeding / anticoagulant risk
Representative pairings are shown below. Large mechanism groups are intentionally summarized to keep profiles focused and crawl-efficient.
Serotonergic activityCertainty: Theoretical
Data provenance recorded for 26 of 26 pairings in this mechanism group.
- 5-HTP — Theoretical interaction certainty
- Caffeine — Theoretical interaction certainty
- crocetin — Theoretical interaction certainty
- crocin — Theoretical interaction certainty
- Crocus Sativus — Theoretical interaction certainty
- DMT — Theoretical interaction certainty
- Ginkgo — Theoretical interaction certainty
- Panax Red Ginseng — Theoretical interaction certainty
- Panax White Ginseng — Theoretical interaction certainty
- Harmaline — Theoretical interaction certainty
- Harmine — Theoretical interaction certainty
- Kanna — Theoretical interaction certainty
+14 more pairings share this mechanism. Use the Safety Checker to review a specific combination.
Bleeding / anticoagulant riskCertainty: Theoretical
Data provenance recorded for 147 of 147 pairings in this mechanism group.
- aescin — Theoretical interaction certainty
- Aged Garlic Extract — Theoretical interaction certainty
- ajoene — Theoretical interaction certainty
- Ajwain — Theoretical interaction certainty
- Allicin — Theoretical interaction certainty
- Garlic — Theoretical interaction certainty
- American Ginseng Extract — Theoretical interaction certainty
- Andrographis — Theoretical interaction certainty
- Angelica Archangelica — Theoretical interaction certainty
- Angelica Dahurica — Theoretical interaction certainty
- Angelica Pubescens — Theoretical interaction certainty
- Angelica Root — Theoretical interaction certainty
+135 more pairings share this mechanism. Use the Safety Checker to review a specific combination.
Moderate Caution
178 flagged pairingsBlood-sugar lowering · Sedation / CNS depression
Moderate Caution
178 flagged pairingsBlood-sugar lowering · Sedation / CNS depression
Representative pairings are shown below. Large mechanism groups are intentionally summarized to keep profiles focused and crawl-efficient.
Blood-sugar loweringCertainty: Theoretical
Data provenance recorded for 110 of 110 pairings in this mechanism group.
- Acarbose — Theoretical interaction certainty
- ajoene — Theoretical interaction certainty
- Allicin — Theoretical interaction certainty
- Aloe Vera — Theoretical interaction certainty
- Alpha-Lipoic Acid — Theoretical interaction certainty
- American Ginseng Extract — Theoretical interaction certainty
- Andrographis — Theoretical interaction certainty
- Anemarrhena Asphodeloides — Theoretical interaction certainty
- Tarragon — Theoretical interaction certainty
- Ashoka — Theoretical interaction certainty
- Astragalus — Theoretical interaction certainty
- Astragalus Membranaceus — Theoretical interaction certainty
+98 more pairings share this mechanism. Use the Safety Checker to review a specific combination.
Sedation / CNS depressionCertainty: Theoretical
Data provenance recorded for 68 of 68 pairings in this mechanism group.
- American Yellow Lotus — Theoretical interaction certainty
- Artemisia Absinthium — Theoretical interaction certainty
- Ashwagandha (Withania somnifera) — Theoretical interaction certainty
- Bacopa — Theoretical interaction certainty
- Black Seed — Theoretical interaction certainty
- Black Tea — Theoretical interaction certainty
- Blue Lotus — Theoretical interaction certainty
- Calamus — Theoretical interaction certainty
- Catuba — Theoretical interaction certainty
- Celastrus Paniculatus — Theoretical interaction certainty
- Chamomile — Theoretical interaction certainty
- Chinese Skullcap — Theoretical interaction certainty
+56 more pairings share this mechanism. Use the Safety Checker to review a specific combination.
Evidence
Evidence Summary
Evidence lens
Read as directional context, not settled clinical proof.
LimitedLimited Evidence
Human clinical evidence: Not the primary signal
Mechanistic / preclinical: Mechanism mapped — Stress Response Modulation
Research maturity: Theoretical / mechanistic research — Mechanistic or unresolved evidence is kept separate from established human outcomes.
Safety boundary: Safety note available — Human evidence is limited.
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.
- Strong
- Multiple RCTs, consistent direction, adequate effect size
- Moderate
- Some RCTs or consistent observational data in humans
- Preliminary / Mixed
- Animal or in-vitro only, or conflicting human data
- Traditional / Theoretical
- Traditional use only; no controlled human trials
Clinical Study Summaries (3)0 human evidence sources · 0 human trials · Participant totals not consistently reported · Consistency not yet classifiable
What the evidence actually shows
This table contains 3 structured sources, including 0 human evidence sources; 0 are human trials.
| Study | Design | N | Dose | Duration | Population | Outcome | Result & magnitude | Source |
|---|---|---|---|---|---|---|---|---|
Kim M et al. · Plants (Basel) · 2022 Background | Other / unclear The study design is not yet classified clearly enough to infer its place in the evidence hierarchy. | — | — | — | — | — | — | PubMed → |
Chae HS et al. · J Diet Suppl · 2025 Background | Other / unclear The study design is not yet classified clearly enough to infer its place in the evidence hierarchy. | — | — | — | — | — | — | PubMed → |
Willer J et al. · Molecules · 2019 Background | Other / unclear The study design is not yet classified clearly enough to infer its place in the evidence hierarchy. | — | — | — | — | — | — | PubMed → |
Dosing & Timing
- No standardized dose
- Preparation specific; use standardized product label for Leaf is used as tea and require source backed dosage review before therapeutic claims.
How Damiana works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Damiana Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & biological pathways (preclinical)
- Stress Response Modulation
Compare related active botanicals
Explore botanicals with similar chemistry, effects, or safety considerations in the Botanical Activity Atlas.
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Sourcing options
Damiana product picks
Recommendation status
Product recommendations are not shown for this profile because the current site safety and monetization policy does not permit them.
Product form & quality guidelines
When sourcing Damiana, verify the label for:
- Standardized extract: Confirm active content percentages on the supplement facts panel (e.g. standardized to specific marker compounds) rather than simple raw herb weights.
- Third-party testing: Look for independent purity labels (USP, NSF, ConsumerLab, or Eurofins) to ensure the product is free from heavy metals, solvents, and contaminants.
- Form bioavailability: Ensure the form matches evidence-supported configurations (e.g. standardized active extracts like bacosides, withanolides, or curcuminoids) for optimal onset and digestion tolerance.
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.
Founder & Head Researcher · Oak Ridge, TN · Last reviewed August 2026
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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