Milk Thistle

Names in Different Languages

English	Milk Thistle
Urdu	مریم گوکھرد
Farsi	خار مریم
Unani	Khar-e-Maryam
French	Chardon-Marie
German	Mariendistel

Traditional Uses

In European folk and herbal medicine, milk thistle seed was used for liver and gallbladder disorders, jaundice, and digestive complaints, and as a bitter tonic to stimulate appetite. It has also been used traditionally in Unani practice for liver ailments, and in Kashmir the wild plant is valued for liver support.

Modern Research

The evidence is genuinely mixed. A 2023 review of 29 randomized trials (3,846 participants) found about two-thirds reported reductions in liver enzyme markers such as ALT and AST, but the average reduction was small and of uncertain clinical importance. A 2007 Cochrane review of 18 trials found no significant effect on deaths or complications in alcohol-related liver disease or hepatitis B or C, and NIH-funded trials in hepatitis C and fatty liver disease found no benefit. The British Liver Trust considers the overall proof insufficient to recommend it as a treatment. One small trial reported lower fasting blood sugar and HbA1c over 4 months.

Uses

• Liver support (silymarin seed extract)
• Traditional liver and gallbladder complaints
• Indigestion and loss of appetite
• Skin and blood-sugar support (traditional)

Benefits of Use

• Liver support: the most studied use; some trials report modest reductions in liver enzyme markers, though evidence is mixed.
• Antioxidant activity: silymarin is studied for scavenging free radicals and supporting glutathione, a key liver antioxidant.
• Blood-sugar support: one small trial reported improved fasting blood sugar and HbA1c over 4 months.
• Digestive comfort: traditionally used as a bitter tonic for dyspepsia and biliary complaints.

Safe Dose & Overdose (mg/g)

Side Effects

• Mild digestive upset, such as bloating, nausea, gas, abdominal fullness or loose stools.
• Headache or itching and skin rash in some people.
• Allergic reactions, especially in people allergic to ragweed, chrysanthemum, marigold or daisy (Asteraceae family).
• Mild allergies have been reported with doses above 1,500 mg/day of silymarin.

Interactions

• Blood thinners (e.g. warfarin): milk thistle may affect how these medicines are processed.
• Diabetes medicines: silymarin may lower blood sugar, so blood sugar should be watched.
• Statins and other medicines broken down by liver enzymes (CYP450): mixed data on whether milk thistle changes their levels.
• Medicines processed by the liver in general: check with a clinician, as interaction data are mixed.

Sources

• Milk Thistle Uses, Benefits & Dosage — Drugs.com
• Milk thistle (silymarin): benefits, evidence and dosage — The NutriScope
• Milk thistle: liver benefits, side effects, dosage — Herbal Plant Guide
• Medicinal Plants: Silybum marianum — names and uses