Herb Profile
Milk Thistle
Silymarin stabilizes hepatocyte membranes and acts as an antioxidant.
Last reviewed: •3 human studies cited
B ModerateUse extra caution — GI upset, rare allergy Details
- Evidence
- Moderate Human Evidence
- Typical onset
- Varies by prep
- Safety rating
- Moderate caution
- Best for
- Antioxidant, Liver Protective, Stress Relief, Inflammatory signaling
- Avoid / review if
- CYP450 Substrates (Mild Interaction)
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Milk Thistle
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Where to go next — guides & comparisons
Continue reading
- If you want help with anxiety or stress → Anxiety & stress guides
- If you want to browse more herbs → All herbs
Safety & Cautions
GI upset, rare allergy
60%
Moderate caution — review before use
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- - CYP450 Substrates (Mild Interaction)
Safety classifications
- - Interaction-Aware: Medication or interaction context is explicitly noted.
Full safety note
- - GI upset, rare allergy
Safety labels
- - Interaction-Aware
Evidence Summary
Evidence lens
Useful signal, but study design, dose, and population still matter.
ModerateModerate Human Evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Inflammatory Signaling Modulation · Oxidative Stress Modulation · Cellular Protection
Research maturity: More interpretable — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — GI upset, rare allergy
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 |
|---|---|---|---|
Common Herbal Dietary Supplement-Drug Interactions Asher GN et al. (2017) | — | — | PubMed → |
Abenavoli L et al. (2018) | — | — | PubMed → |
Silymarin as Supportive Treatment in Liver Diseases: A Narrative Review Gillessen A et al. (2020) | — | — | PubMed → |
Dosing & Timing
Dose guidance
420 600 mg/day silymarin
How Milk Thistle Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Milk Thistle 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 ModulationCellular ProtectionStress Response Modulation
Active Compounds
Key constituents studied in Milk Thistle, with full pharmacology and safety profiles.
Condition guides
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Review available sources for Milk Thistle
Independent database mapping — evaluated separately from safety and efficacy scores.
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Affiliate-ready sourcing
Milk Thistle product picks
Affiliate recommendations for Milk Thistle. Review safety, dose, and product quality before buying.
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Product Form & Quality Guidelines
When sourcing Milk Thistle, 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.
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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 Milk Thistle
Silybum marianum herb profile covering silymarin antioxidant mechanisms, hepatocyte support context, dosage, and safety considerations. 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 Milk Thistle, 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.