Benefits
Traditional bitter herb for digestion and appetite
A published review describes European folk use of mugwort to stimulate gastric juice and for flatulence, colic and poor appetite, and its leaves season rice dishes and teas in parts of Asia. These uses rest on tradition alone: no controlled human studies of oral mugwort have been published, and the review reports that Germany's Commission E listed the traditional uses without recommending therapeutic use.
Stomach lining protection in animal studies
In animal models, a water and alcohol extract of mugwort (3 to 30 mg/kg) and its essential oil component sabinene protected the stomach lining against alcohol and an NSAID painkiller and lowered markers of oxidative stress and inflammation; the extract also raised stomach pH, and no acute toxicity was seen in mice. These are animal results, and the proposed molecular targets came from computer modeling.
Liver protection by mugwort essential oil in mice
In mice given a liver-damaging dose of acetaminophen, mugwort essential oil or its component eucalyptol, given by stomach tube for 3 days, reduced liver enzyme rises and oxidative stress. Eucalyptol switched on the Nrf2 antioxidant pathway and shifted acetaminophen toward non-toxic breakdown. There are no human data, and this does not make mugwort a remedy for drug overdose.
Antiparasitic activity of leaf extract in mice
In mice infected with a rodent malaria parasite, an oral ethanol leaf extract at 500 to 1000 mg/kg cut parasite levels by about 79 to 87% when given from the start of infection, but had no significant effect once infection was established. A review notes that travelers who used mugwort this way in eastern Africa were not protected; it is not a substitute for medical malaria prevention.
Mechanism of action
Thujone blocks a calming brain receptor
Alpha-thujone blocks the GABA type A receptor, the brain's main calming signal channel; in mice its poisoning signs resembled those of a convulsant and were eased by diazepam. In lab tests, mouse liver enzymes broke it down quickly. A published review reports thujone ranging from none to about a fifth of mugwort essential oil depending on plant source, which is why dose and source matter.
Shared proteins drive pollen and food cross-reactions
Mugwort pollen allergens resemble proteins in celery, carrot and several spices, including profilins, lipid transfer proteins and high molecular weight glycoallergens. In celery-allergic patients, IgE to the celery protein Api g 7 tracked closely with the mugwort allergen Art v 1 and was linked to more severe reactions.
Antioxidant pathway activation in animal work
In mice, eucalyptol from mugwort essential oil activated the Nrf2 antioxidant pathway. In animal stomach models, mugwort extract raised glutathione and catalase and lowered lipid peroxidation and the inflammatory signals IL-6 and IL-17A. These findings have not been tested in people.
Clinical trials
Single-patient case report with laboratory measurement of thujone in blood by HPLC and gas chromatography. (Di Lorenzo et al. 2018, J Food Sci)
A 49-year-old man brought to an emergency room in Zurich in a manic state after drinking about 1 liter of mugwort infusion; the title describes repeated ingestion.
Serum thujone was 27.7 µg/mL on day 0 and 24.1 µg/mL on day 1, and thujone poisoning was confirmed. The authors could not tell whether the cause was an unusually thujone-rich plant, chronic exposure, slow metabolism, or contamination with another Artemisia species such as wormwood. One case cannot show how common such reactions are.
Diagnostic study measuring IgE to celery and mugwort allergen components in patients with confirmed celery allergy. (Ballmer-Weber et al. 2024, J Allergy Clin Immunol)
79 celery-allergic patients confirmed by food challenge or a clear history of severe anaphylaxis; 30 with mild mouth or eye-nose symptoms and 49 with systemic reactions.
77% had IgE to mugwort pollen. IgE to the celery protein Api g 7 (52% of patients) correlated closely with the mugwort allergen Art v 1 (r = 0.86), and Api g 7 sensitization carried about 6-fold higher odds of severe anaphylaxis versus mild mouth symptoms (odds ratio 5.87, 95% CI 1.08 to 32.0). The study did not test mugwort products.
Clinical series with skin prick, scratch, intradermal and RAST testing; German-language paper with English abstract. (Wüthrich et al. 1985, Schweiz Med Wochenschr)
35 patients (85% women) with active celery allergy diagnosed during the first 8 months of 1984.
Only 8 of the 35 were not sensitized to mugwort pollen. Celery reactions ranged from mouth hives to anaphylactic shock. Cross-reactions explained positive tests to carrot, parsley, anise, fennel and caraway, and carrot allergy was clinically important in half the cases, including one anaphylactic shock after raw carrot.
Skin scratch testing with powdered commercial spices plus blood IgE (RAST) testing. (Stäger et al. 1991, Allergy)
70 people with positive skin tests to celery and to birch and/or mugwort pollen; spice IgE (RAST) measured in 41 with a positive celery RAST.
Aniseed, fennel, coriander and cumin gave positive scratch tests in more than 24 patients, while spices from other plant families were positive in 3 of 11 tested. Spice IgE reached up to class 3, especially in people sensitized to celery and mugwort (with or without birch), across several plant families. The study did not test mugwort products.
Animal study of a hydroalcoholic mugwort extract and sabinene in several stomach injury, healing and recurrence models, with chemical profiling and molecular docking. (Borba et al. 2026, J Ethnopharmacol)
Laboratory animals; extract at 3, 10 or 30 mg/kg and sabinene at 3 mg/kg; acute toxicity tested in mice. No human participants.
The extract and sabinene protected the stomach lining against ethanol and piroxicam and reduced ulceration in healing and recurrence models, raising glutathione and catalase and lowering lipid peroxidation, IL-6 and IL-17A. The extract also raised gastric pH. No acute toxicity was seen in mice. The molecular targets were predicted by computer docking and still need experimental confirmation.
Pilot animal study using a 4-day suppressive test and a curative test with an oral ethanolic leaf extract, with the antimalarial drug Coartem as the positive control. (Bamunuarachchi et al. 2013, J Vector Borne Dis)
Male ICR mice infected with Plasmodium berghei; extract at 250, 500, 750 or 1000 mg/kg. No human participants.
In the suppressive test, 500, 750 and 1000 mg/kg cut parasite levels by 79.3%, 79.6% and 87.3% (p 0.01 or less). In the curative test there was no significant effect. Long-term dosing at the highest level showed no overt liver, kidney or blood toxicity in the mice.