#silymarin
Silymarin is a complex of flavonoids extracted from the seeds of the plant Silybum marianum, also known as armorial. The main components are silybin, silydianin and silicristin, silybin being the most active constituent. Silymarin is known for its hepatoprotective, antioxidant and anti-inflammatory effects. It acts by stabilizing the membranes of liver cells, protecting the liver against toxins, free radicals and the harmful effects of certain drugs or alcohol. In addition, silymarin can stimulate the regeneration of hepatocytes and can modulate the hepatic inflammatory response.
The mechanism of action of silymarin in the body:
1. Protection of hepatocytes (liver cells)
Silymarin has the ability to stabilize the cell membrane of hepatocytes. The cell membrane is like a barrier that protects the cell from toxic substances. Through this stabilization:
– membrane permeability to toxins is reduced;
– liver enzymes (AST, ALT) that can leak into the blood in case of liver damage remain in the cell;
-cell death is prevented (necrosis or apoptosis induced by toxins).
2. The antioxidant effect
Silymarin is a powerful natural antioxidant:
– neutralizes free radicals, unstable molecules that affect membrane lipids, proteins and DNA of hepatocytes;
-stimulates endogenous antioxidant enzymes of the liver, such as glutathione peroxidase and superoxide dismutase;
-reduces lipid peroxidation, a process by which cell membrane lipids are destroyed by free radicals, which leads to inflammation and cell death.
3. Stimulation of liver regeneration
Silymarin can accelerate liver recovery after injuries:
-stimulates the synthesis of liver proteins, including proteins involved in the repair of cell membranes;
– activates the growth factors of hepatocytes, favoring the proliferation of healthy liver cells;
-contributes to the restoration of liver function after exposure to alcohol, hepatotoxic drugs or viruses.
4. Anti-inflammatory effect
Silymarin can reduce inflammation in liver tissue by:
– inhibition of the production of pro-inflammatory cytokines (eg: TNF-alpha, IL-1, IL-6);
-reducing the infiltrate of immune cells in the liver;
-decrease in the expression of some enzymes that participate in cell inflammation, such as COX-2.
5. Choleretic and bile effect
Silymarin can stimulate bile secretion and bile flow:
-helps with the digestion of fats and the absorption of fat-soluble vitamins;
-contributes to the elimination of toxins metabolized by the liver through bile;
– it can prevent the formation of gallstones by improving bile flow.
– it can have antioxidant effects in other tissues as well, not only in the liver;
– can influence the metabolism of glucose and lipids, with beneficial effects in hepatic steatosis (fatty liver).
Liver diseases in which silymarin is recommended:
Acute and chronic hepatitis
-Silymarin can be used as an adjuvant in viral hepatitis (hepatitis B or C) to protect hepatocytes and reduce oxidative stress.
-In toxic hepatitis (drugs, alcohol, chemical substances), silymarin can reduce hepatocyte damage and support liver regeneration.
Liver cirrhosis
-In cirrhosis, healthy liver tissue is progressively replaced by fibrotic tissue, and the liver becomes more sensitive to toxins and oxidative stress.
– Silymarin can contribute to the protection of the remaining liver cells and to the reduction of inflammation, being used as a supportive treatment.
Hepatic steatosis (non-alcoholic or alcoholic fatty liver)
-In the case of fatty liver, the accumulation of lipids causes oxidative stress and inflammation.
– Silymarin can reduce lipid peroxidation, inflammation and can improve liver function (ALT and AST enzymes).
Drug or alcohol toxicity
– Silymarin is often used to prevent and reduce liver damage induced by hepatotoxic drugs (eg anti-tuberculosis, statins, paracetamol overdose).
-In alcohol intoxication, it protects hepatocytes and supports liver regeneration.
Cholestasis and biliary disorders
-Silymarin can be used in diseases with biliary stasis, helping to stimulate bile flow and reduce associated digestive discomfort.
Practically, silymarin is not a main treatment, but an adjuvant that protects the liver, reduces inflammation and oxidative stress and supports the regeneration of liver cells.
Administration:
1. Forms available
Silymarin is found in several forms:
-Capsules or tablets standardized with extract of armory (typical concentration 70-80% silybin);
-Tinctures and liquid extracts;
-Powders or teas, less used in clinical practice for liver diseases;
-Preparations combined with other plants or antioxidants (eg: Vitamin E, zinc, turmeric).
2. Recommended dosage
-The usual dose for adults is 420–600 mg of standardized extract per day, divided into 2–3 doses.
-Some clinical studies use 420 mg/day (for example 140 mg 3 times a day) for chronic liver diseases;
– The dose can be adjusted depending on the concentration of silybin and the patient’s tolerance;
-For hepatic steatosis, doses of 420 mg/day were used for 6–12 months, with beneficial effects on transaminases and inflammatory markers.
3. Duration of treatment
-Short-term: 4–8 weeks in cases of mild liver protection or detoxification;
-Long-term: 3–12 months in chronic liver diseases (steatosis, stabilized cirrhosis) under medical supervision;
-Monitoring of liver function (AST, ALT, GGT, bilirubin) is recommended at regular intervals to evaluate the response to treatment.
4. Mode of administration
– It is preferably administered before meals for better absorption;
– Silymarin has a low oral absorption (approximately 20–50%), but standardized forms or with increased bioavailability (phospholipid complex – “phospholipid silibinin”) increase absorption;
– It is important to respect the recommended dose and avoid long-term self-treatment without medical supervision, especially in patients with severe liver diseases.
5. Precautions
– Contraindicated in cases of allergy to plants from the Asteraceae family (daisies, armour, chicory);
– It can interact with certain drugs metabolized by the liver (eg: anticoagulants, statins) by modulating cytochrome P450 enzymes;
– In children, the dose must be adjusted strictly under medical supervision; studies are more limited.
General observations:
• Silymarin is preferably administered before meals for better absorption;
• It is recommended to monitor liver function at regular intervals;
• for children, the doses must be adjusted by the doctor;
• Contraindications: allergy to plants from the Asteraceae family; attention to possible drug interactions (statins, anticoagulants, etc.).
Silymarin is a natural ally of the liver, protecting liver cells by stabilizing hepatocyte membranes, reducing oxidative stress and inflammation and stimulating cell regeneration. These mechanisms contribute to maintaining optimal liver function, supporting detoxification processes and the general metabolic balance of the body. For additional support, the product Liver Aid from Calivita combines silymarin with essential amino acids, vitamins and other nutrients that support the synthesis of liver proteins and the general function of the liver, offering a complete formula for liver protection and regeneration. Thus, the use of silymarin, especially in the form of standardized supplements such as Liver Aidcan represent a natural strategy to support the health of the liver and the body as a whole.
This article was written by…
Dr. Andreea Ene-Dobre
Resident doctor in emergency medicine
Doctor graduated from the Faculty of General Medicine at the Carol Davila University of Medicine and Pharmacy in Bucharest, with over 10 years of practice and experience in the emergency room – the emergency reception unit in two of the largest emergency hospitals in Bucharest. Doctor at SMURD Romania – Bucharest, student trainer at UMF Carol Davila Bucharest.
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