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Redstem wormwood

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Artemisia scoparia

Family: Asteraceae Genus: Artemisia Species: scoparia

Synonyms: Artemisia kohatica, Artemisia scopariiformis, Artemisia capillaris var. scoparia, Artemisia scoparioides, Artemisia scoparia f. sericea, Artemisia capillaris var. grandiflora, Artemisia trichophylla, Artemisia scoparia subsp. villosa, Artemisia capillaris f. elegans, Draconia scoparia, Artemisia scoparia var. heteromorpha, Artemisia capillaris f. myriocephala, Artemisia scoparia f. villosa, Artemisia gracilis, Artemisia capillaris f. villosa, Artemisia capillaris f. williamsonii, Oligosporus scoparius, Artemisia capillaris f. kohatica, Artemisia piperita

Redstem wormwood
Redstem wormwood

Western Herbalism Properties

Actions:
hepaticanti-inflammatorydiuretic

Botanical Description

Artemisia scoparia, known as virgate, redstem or capillary wormwood, is an aromatic annual, biennial or short-lived perennial herb of the daisy family (Asteraceae), widely distributed across temperate Eurasia from eastern Europe through Central Asia to China and Japan, where it grows on dry, sandy and disturbed ground, slopes and roadsides. Young plants form a rosette of finely divided, soft, silky-haired leaves; as the plant matures it sends up slender, often reddish, much-branched stems up to about a metre tall that become broom-like, with the upper leaves reduced to fine, thread-like (capillary) segments. The numerous tiny, nodding flower heads are greenish to yellowish, arranged in open, diffuse panicles, and contain only minute disc florets, wind-pollinated as in most wormwoods. The whole plant is strongly aromatic. The dried young shoots and leaves, harvested in spring, constitute the medicinal drug, and the species is highly esteemed in East Asian herbal medicine.

Native Region: Afghanistan, Albania, Altay, Amur, Austria, Bulgaria, Buryatiya, Central European Rus, China North-Central, China South-Central, China Southeast, Chita, Czechoslovakia, East Aegean Is., East European Russia, Egypt, Finland, France, Germany, Greece, Gulf States, Hungary, India, Inner Mongolia, Iran, Iraq, Irkutsk, Italy, Japan, Kazakhstan, Khabarovsk, Kirgizstan, Krasnoyarsk, Krym, Manchuria, Mongolia, Myanmar, Netherlands, North Caucasus, North European Russi, Northwest European R, Pakistan, Poland, Primorye, Qinghai, Romania, Saudi Arabia, South European Russi, Switzerland, Tadzhikistan, Tibet, Transcaucasus, Turkey, Turkey-in-Europe, Turkmenistan, Tuva, Ukraine, Uzbekistan, West Himalaya, West Siberia, Xinjiang, Yakutskiya, Yugoslavia

Active Constituents

Scoparone (6,7-dimethoxycoumarin)

Coumarin

Concentration: Major pharmacologically active coumarin

The best-characterised active. Exerts hepatoprotective, choleretic, anti-inflammatory, anti-fibrotic, antioxidant, vasorelaxant and lipid-lowering effects, largely via inhibition of NF-kB signalling and modulation of bile-acid transport; active in models of acute liver injury, alcoholic liver disease, NAFLD and hepatic fibrosis.

Capillarisin

Chromone

Concentration: Characteristic minor constituent

Choleretic and antioxidant; contributes to the classic bile-promoting (yin chen) activity and anti-inflammatory effects.

Chlorogenic acid and dicaffeoylquinic acids (3,5-/4,5-/1,4-)

Hydroxycinnamic acid esters

Concentration: Abundant phenolic acids

Major contributors to the strong DPPH/ABTS radical-scavenging antioxidant activity of aqueous extracts and to hepatoprotection.

Scopoletin and scopolin

Coumarins

Concentration: Minor coumarin constituents

Add anti-inflammatory and antioxidant activity and are markers of the coumarin fraction.

Capillin and capillene (polyacetylenes)

C-polyacetylenes

Concentration: Essential-oil constituents

Antifungal/antimicrobial volatile compounds characteristic of the aromatic oil.

Flavonoids (rutin, hyperoside, luteolin, cirsimaritin)

Flavonol and flavone glycosides/aglycones

Concentration: Widespread minor constituents

Antioxidant and anti-inflammatory; some flavonoids and the coumarins contribute to the extract's PPAR-gamma-activating, insulin-sensitising activity.

⚠ Drug Interactions

Antidiabetic agents (insulin, sulfonylureas, thiazolidinediones)

Moderate Evidence: Theoretical

Ethanolic A. scoparia extract activates PPAR-gamma and enhances adipocyte insulin action in preclinical models, so combined use could theoretically potentiate glucose-lowering and, with PPAR-gamma agonists (glitazones), additive effects on adipose function.

Clinical note: Monitor blood glucose if used alongside pharmacological antidiabetic therapy; no human interaction data exist.

Hepatically metabolised drugs (CYP450 substrates)

Minor Evidence: Theoretical

Scoparone and other coumarins modulate hepatic enzyme activity and bile flow in animal studies; in principle this could alter the clearance of co-administered CYP-metabolised drugs.

Clinical note: Clinically unquantified; use caution with narrow-therapeutic-index drugs during heavy or prolonged use.

Preparation Methods

Decoction of aerial parts (young shoots)

Parts: aerial parts, young shoot

The dried young herb (a botanical source of the traditional Chinese drug Yin Chen Hao, shared with A. capillaris) is decocted and taken for jaundice, damp-heat and hepatobiliary complaints. Best collected young; in traditional practice it is avoided where jaundice is due to cold-deficiency rather than damp-heat.

Aqueous or hydroethanolic extract

Parts: aerial parts

Standardised extracts are studied for hepatoprotective, choleretic, antioxidant and metabolic (insulin-sensitising) activity; scoparone and chlorogenic/dicaffeoylquinic acids are typical marker compounds.

Essential oil / infusion

Parts: aerial parts, flowering tops

The aromatic oil (capillin/capillene, tocopherol derivatives) has antimicrobial and antioxidant activity; used in dilute topical and vapour applications. Concentrated oil should not be ingested.

Clinical Studies

Artemisia scoparia enhances adipocyte development and endocrine function in vitro and enhances insulin action in vivo

Wang ZQ, Ribnicky D, Zhang XH, et al. (2014) PLoS ONE In vitro (3T3-L1 adipocytes) and in vivo (diet-induced obese mice)

An ethanolic extract activated the PPAR-gamma ligand-binding domain, promoted adipocyte differentiation and adiponectin secretion, and in diet-induced obese mice raised adiponectin and increased eWAT AMPK-alpha phosphorylation, consistent with improved insulin sensitivity.

DOI: 10.1371/journal.pone.0098897 Link

Historical Texts

Shennong Ben Cao Jing (Divine Farmer's Materia Medica) and later Chinese pharmacopoeial tradition (Yin Chen Hao)

Han dynasty compilation (c. 1st-2nd century CE), transmitted through subsequent bencao literature
Artemisia scoparia is one of the two officially recognised botanical sources of Yin Chen Hao, the classical Chinese drug prescribed for jaundice and damp-heat of the liver and gallbladder; the young spring herb is preferred.

References

  1. Ma Y, Sun H, Ye Y, et al.. Artemisia scoparia: Traditional uses, active constituents and pharmacological effects . Journal of Ethnopharmacology, 273:113960 (2021) [DOI]
  2. Wang ZQ, Ribnicky D, Zhang XH, et al.. Artemisia scoparia enhances adipocyte development and endocrine function in vitro and enhances insulin action in vivo . PLoS ONE, 9(6):e98897 (2014) [DOI]

This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.

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