Milk Thistle

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NameMilk Thistle

Scientific NameSilybum marianum

Common NamesMilk Thistle, St. Mary's Thistle, Holy Thistle

Plant FamilyAsteraceae

Natural HabitatNative to Southern Europe, North Africa, and the Middle East, Milk Thistle now grows worldwide in disturbed areas, roadsides, fields, and along riverbanks, thriving in sunny, well-drained locations. The image metadata indicates it was found by a river in Swifts Creek, Victoria.

Parts Usedseed,leaf,root

Medicinal Actionsantioxidant,anti-inflammatory

Traditional UsesTraditionally, Milk Thistle has been used for liver and gallbladder disorders, including hepatitis, cirrhosis, and jaundice. It is also employed to protect the liver from toxins, support detoxification processes, and improve digestive health.

Active ConstituentsSilymarin (a complex of flavonolignans including silybin, silychristin, and silydianin), Flavonoids

Preparation Methodsdecoction,tincture,powder,infusion

Contraindications & WarningsIndividuals with allergies to plants in the Asteraceae family (e.g., ragweed, daisies, marigolds) may experience allergic reactions. Milk Thistle may interact with certain medications, particularly those metabolized by the liver, and should be used with caution in individuals with hormone-sensitive conditions due to potential estrogenic effects.

Cultivation NotesMilk Thistle is easy to grow from seed in full sun and well-drained soil. It is drought-tolerant once established and often self-seeds readily, potentially becoming invasive in some regions. Seeds are typically sown in spring or autumn.

Raritycommon

Description

Milk Thistle is a robust annual or biennial plant characterized by its large, spiny leaves with distinctive white veins and a striking purple, thistle-like flowerhead. The plant can grow quite tall, often reaching heights of 2-6 feet, and is easily recognized by its formidable spines.

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