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Herb Profile
Yarrow
Achillea millefolium
Yarrow (Achillea millefolium) carries a Grade C rating — limited evidence.
Last reviewed: Report a correctionProfile-wide ·C Limited
Use extra caution — Asteraceae family herb; allergy is a practical concern. Details
- Evidence
- Limited Evidence
- Typical onset
- Varies by prep
- Safety rating
- High caution
- Best for
- Anti Inflammatory, Digestive, Inflammatory signaling
- Avoid / review if
- Asteraceae/Ragweed Allergy, Pregnancy, Bleeding Disorders Or Anticoagulant Therapy Without Clinician Review.
At a glance
From this profile's structured data- Evidence
- Grade C
- Safety
- Asteraceae-family herb; allergy is a practical concern.
- Profile context
- anti-inflammatory, digestive
Next stepsWhere to go next — guides & comparisons
Continue reading
- If you want to browse more herbs → All herbs
Safety
Safety & Cautions
Asteraceae family herb; allergy is a practical concern. Avoid high dose or prolonged internal use without review.
High caution
Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.
- Anticoagulant CautionBleeding or anticoagulant-adjacent caution language is present.
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- Asteraceae/Ragweed Allergy
- Pregnancy
- Bleeding Disorders Or Anticoagulant Therapy Without Clinician Review.
- Potential Additive Effects With Anticoagulants/Antiplatelets
- Possible Allergy Cross Reactivity With Ragweed Family Plants.
Safety classifications
- Anticoagulant Caution: Bleeding or anticoagulant-adjacent caution language is present.
Full safety note
- Asteraceae family herb; allergy is a practical concern. Avoid high dose or prolonged internal use without review.
Safety labels
- Anticoagulant 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.
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 — Inflammatory Signaling Modulation
Research maturity: Theoretical / mechanistic research — Mechanistic or unresolved evidence is kept separate from established human outcomes.
Safety boundary: Safety note available — Asteraceae family herb; allergy is a practical concern.
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
Dosing & Timing
- No standardized dose
- Preparation specific; use standardized product label for Flowering tops are used as tea and require source backed dosage review before therapeutic claims.
How Yarrow works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Yarrow 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 Modulation
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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 Yarrow
Yarrow herb profile with evidence context, key research topics, source notes, safety context, and references presented in an evidence-first format. 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 Yarrow, 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.