Herb Profile
Epimedium
Epimedium is represented here primarily through icariin and related prenylated flavonoids such as epimedin A, B, and C.
Last reviewed: •3 sources citedReport a correctionProfile-wide ·C Limited
Use extra caution — Use caution in people with blood pressure instability, hormone sensitive conditions, or high sensitivity to activating supplements. Details
- Evidence
- Limited Evidence
- Typical onset
- Varies by prep
- Safety rating
- High caution
- Best for
- Reproductive, Energy, Athletic performance
- Avoid / review if
- Pregnancy/Breastfeeding, Hormone Sensitive Conditions Without Review, Arrhythmia/Cardiovascular Disease Caution
Safety
Safety & Cautions
Use caution in people with blood pressure instability, hormone sensitive conditions, or high sensitivity to activating supplements. Keep positioning moderate rather than performance driven.
High caution
Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.
- Hormonal Activity ContextHormone-adjacent wording is present and should be interpreted carefully.
- Pregnancy/Breastfeeding CautionPregnancy or breastfeeding caution language is present.
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- Pregnancy/Breastfeeding
- Hormone Sensitive Conditions Without Review
- Arrhythmia/Cardiovascular Disease Caution
- May Interact With Antihypertensives
- PDE5 Inhibitors
- Anticoagulants
- And Hormone Therapies.
Safety classifications
- Hormonal Activity Context: Hormone-adjacent wording is present and should be interpreted carefully.
- Pregnancy/Breastfeeding Caution: Pregnancy or breastfeeding caution language is present.
Full safety note
- Use caution in people with blood pressure instability, hormone sensitive conditions, or high sensitivity to activating supplements. Keep positioning moderate rather than performance driven.
Safety labels
- Hormonal Activity Context
- 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
147 flagged pairingsBleeding / anticoagulant risk
High-Priority Caution
147 flagged pairingsBleeding / anticoagulant risk
Representative pairings are shown below. Large mechanism groups are intentionally summarized to keep profiles focused and crawl-efficient.
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
81 flagged pairingsBlood-pressure effects
Moderate Caution
81 flagged pairingsBlood-pressure effects
Representative pairings are shown below. Large mechanism groups are intentionally summarized to keep profiles focused and crawl-efficient.
Blood-pressure effectsCertainty: Theoretical
Data provenance recorded for 81 of 81 pairings in this mechanism group.
- Agmatine sulfate — Theoretical interaction certainty
- ajoene — Theoretical interaction certainty
- Allicin — Theoretical interaction certainty
- American Ginseng Extract — Theoretical interaction certainty
- Andrographis — Theoretical interaction certainty
- Angelica Dahurica — Theoretical interaction certainty
- Astaxanthin — Theoretical interaction certainty
- Astragalus Membranaceus — Theoretical interaction certainty
- Beetroot extract — Theoretical interaction certainty
- Berberis — Theoretical interaction certainty
- Bicarbonate — Theoretical interaction certainty
- Black Seed — Theoretical interaction certainty
+69 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 — Vascular Function Support · Endothelial Function Support
Research maturity: Theoretical / mechanistic research — Mechanistic or unresolved evidence is kept separate from established human outcomes.
Safety boundary: Safety note available — Use caution in people with blood pressure instability, hormone sensitive conditions, or high sensitivity to activating supplements.
This profile cites 3 human studies.
Study design details
Evidence Grade
Grade C: Limited Evidence
Evaluation of methodological rigor, population reach, and evidence alignment.
- Design Match
- Narrative review
- Risk of Bias
- High
- Consistency
- Not assessed
Strongest recorded design is a narrative review, drawn from 2 recorded studies, none of which measured an outcome in people.
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
Filter by study class
Showing 3 of 3 studies.
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 |
|---|---|---|---|---|---|---|---|---|
Botanicals and Their Bioactive Phytochemicals for Women's Health Dietz BM et al. · Pharmacol Rev · 2016 Background | Narrative review Summarizes selected literature without the full prespecified search and selection methods of a systematic review. | — | — | — | — | — | — | PubMed → |
Anti-inflammatory and immunoregulatory effects of icariin and icaritin Bi Z et al. · Biomed Pharmacother · 2022 Background | Narrative review Summarizes selected literature without the full prespecified search and selection methods of a systematic review. | — | — | — | — | — | — | PubMed → |
Yan Q et al. · J Nanobiotechnology · 2024 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 extracts standardized to icariin/flavonoids and require source backed dosage review before therapeutic claims.
How Epimedium works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Epimedium Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & biological pathways (preclinical)
- Vascular Function Support
- Endothelial Function Support
Active Compounds
Key constituents studied in Epimedium, with full pharmacology and safety profiles.
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.
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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