Herb Profile
Milk Thistle Silybum Marianum
Milk Thistle (Silybum marianum) is traditionally used for liver support, with its flavonolignan complex silymarin studied for antioxidant, anti inflammatory, and hepatoprotective activity.
Last reviewed: •4 human studies cited
B ModerateUse extra caution — Generally safe; mild GI upset; possible allergic reactions Details
- Evidence
- Moderate Human Evidence
- Typical onset
- Varies by prep
- Safety rating
- Moderate caution
- Best for
- Antioxidant, Liver Protective, Stress resilience, Inflammatory signaling
- Avoid / review if
- Ragweed Allergy, CYP/Transporter Effects Reported In Vitro, Clinically Significant Interactions Not Well Established
Monograph visual
Milk Thistle Silybum Marianum
The Hippie Scientist
Where to go next — guides & comparisons
Continue reading
- If you want to browse more herbs → All herbs
Safety & Cautions
Generally safe; mild GI upset; possible allergic reactions
60%
Moderate caution — review before use
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- - Ragweed Allergy
- - CYP/Transporter Effects Reported In Vitro
- - Clinically Significant Interactions Not Well Established
Safety classifications
- - Liver-Sensitive: Liver-related caution language appears in the profile.
Full safety note
- - Generally safe; mild GI upset; possible allergic reactions
Safety labels
- - Liver-Sensitive
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 — Oxidative Stress Modulation · Cellular Protection · NF KB Modulation
Research maturity: Preliminary or mixed — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — Generally safe; mild GI upset; possible allergic reactions
This profile cites 4 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 (4)Cited studies informing this profile. RCTs and reviews shown first.
| Study | Type | Sample | Source |
|---|---|---|---|
Abenavoli L et al. (2018) | — | — | PubMed → |
Safety and toxicity of silymarin, the major constituent of milk thistle extract: An updated review Soleimani V et al. (2019) | — | — | PubMed → |
PubMed indexed authors (2006) | — | — | PubMed → |
PubMed | — | — | PubMed → |
Dosing & Timing
Dose guidance
Standardized extract (70 80% silymarin): 140 420 mg/day in divided doses; variability in silybin content
How Milk Thistle Silybum Marianum Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Milk Thistle Silybum Marianum 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 ModulationCellular ProtectionNF KB ModulationNrf2 Activation
Active Compounds
Key constituents studied in Milk Thistle Silybum Marianum, 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 Silybum Marianum
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.
Affiliate-ready sourcing
Milk Thistle product picks
Affiliate recommendations for Milk Thistle Silybum Marianum. Review safety, dose, and product quality before buying.
Affiliate disclosure: we may earn a commission from qualifying links at no extra cost to you. How we stay independent.
Product Form & Quality Guidelines
When sourcing Milk Thistle Silybum Marianum, 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.
Supplement stacking
Stack Milk Thistle Silybum Marianum With
Commonly paired with Milk Thistle Silybum Marianum. Review interactions and dosage before combining.
Affiliate disclosure: we may earn a commission from qualifying links at no extra cost to you. How we stay independent.
Compare herbs
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 Milk Thistle Silybum Marianum 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 Milk Thistle Silybum Marianum
Milk thistle herb profile covering seed-focused use, liver-support context, antioxidant mechanisms, 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 Silybum Marianum, 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.