Hermetica Superfood Encyclopedia
Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.
Review flags: AWAITING_SEMANTIC_VALIDATION
Milk thistle (Silybum marianum) contains silymarin, a flavonoid complex that primarily supports liver function through hepatoprotective mechanisms. The compound works by stabilizing hepatocyte membranes and promoting antioxidant activity in liver tissue.
Origin & History
Silybum marianum (milk thistle) is a thistle species native to the Mediterranean region of Europe, now also found in North America. The plant's seeds and fruits contain the highest concentration of active compounds, with extracts typically obtained through solvent methods like Soxhlet or microwave-assisted extraction. The primary bioactive component is silymarin, a complex mixture of flavonolignans that comprises 4-6% of the seeds.
Research Narrative (Provisional)
The research dossier does not provide specific clinical trials, RCTs, or meta-analyses with PMIDs for milk thistle. While the compound has been studied, the available sources lack details on study designs, sample sizes, or clinical outcomes.
Preparation & Dosage
Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.
Nutritional Profile
Silybum marianum (Milk Thistle) seeds contain the following nutritional and bioactive constituents: Crude protein: 25-30% of dry weight; Fixed oils/fatty acids: 20-30% of seed weight, primarily linoleic acid (50-60% of fatty oil), oleic acid (20-25%), palmitic acid (8-10%), and stearic acid (3-5%). Primary bioactive complex - Silymarin: 1.5-3% of dry seed weight, comprising a flavonolignan mixture including Silybin A and B (the most biologically active, representing 50-60% of silymarin complex), Isosilybin A and B (5-10%), Silychristin (10-20%), Silydianin (5-10%), and Taxifolin (2-5%). Total phenolic content: 24-35 mg GAE/g dry weight. Flavonoid content: 15-28 mg quercetin equivalents/g. Tocols (tocopherols): 100-150 mg/100g, primarily gamma-tocopherol. Sterols: Beta-sitosterol and campesterol at approximately 200-400 mg/100g combined. Fiber: 20-25% of seed weight (insoluble predominant). Minerals: Potassium (~900 mg/100g), Magnesium (~300 mg/100g), Phosphorus (~500 mg/100g), Calcium (~200 mg/100g), Iron (~7-9 mg/100g), Zinc (~4-6 mg/100g). Bioavailability note: Silybin has poor oral bioavailability (~23-47%) due to low water solubility; phosphatidylcholine complexes (phytosome form) improve bioavailability by up to 4-fold. Standardized extracts are typically normalized to 70-80% silymarin content.
Reported Mechanism (Provisional)
Silymarin, the primary bioactive complex in milk thistle, stabilizes hepatocyte cell membranes and inhibits hepatotoxin uptake. The flavonoid components (silybin, silydianin, silychristin) enhance glutathione synthesis and regulate inflammatory pathways including NF-κB. These compounds also demonstrate free radical scavenging activity through phenolic hydroxyl groups.
Clinical Narrative (Provisional)
Clinical studies on milk thistle have shown mixed results, with some trials demonstrating modest improvements in liver enzyme levels in hepatitis patients. A systematic review of 13 randomized trials found limited evidence for significant clinical benefits in liver disease. Most human studies have used standardized silymarin extracts containing 70-80% silymarin at doses of 140-800mg daily. The evidence quality remains moderate due to small sample sizes and methodological variations across studies.
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