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Limited evidenceSleep & relaxation

Mugwort

A bitter Artemisia herb with a long history as a digestive tonic and, in folklore, as a dream herb. There are no clinical trials supporting either use, and mugwort is a well-documented allergen.

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What the science says

  • Vivid dreams and sleep effects Limited evidence

    A comprehensive review of the genus Artemisia catalogues traditional uses and preclinical pharmacology but identifies no controlled human trials of Artemisia vulgaris for dreaming, sleep onset or sleep quality. Sedative activity has been shown for other Artemisia species in rodents, which does not transfer automatically to mugwort.

  • Digestive bitter Limited evidence

    The same review documents traditional use of mugwort as a bitter tonic for appetite and digestion, supported by its sesquiterpene lactone content. No randomised trial has tested these digestive endpoints in humans.

  • Allergenic potential Moderate evidence

    An analysis of allergenic risk among Asteraceae medicinal plants places mugwort among the family's significant sensitisers, consistent with its established role in pollen allergy and pollen-food cross-reactivity. This is the best-documented biological effect of the plant in humans.

Dosage & safety

Studied doseNo trial-based dose exists. Traditional use is 0.5–2 g of dried herb as an infusion or 1–2 mL of tincture before meals; capsule labels typically list 300–500 mg.
SafetyMugwort is a major pollen allergen and cross-reacts with birch pollen, celery, carrot, spices and other Asteraceae such as chamomile and ragweed — people with these allergies should avoid it. It has traditional emmenagogue and abortifacient use and must be avoided in pregnancy; avoid while breastfeeding. Thujone-containing preparations should not be used long term or in high doses, and people with epilepsy should avoid it.

How to take it

TimingTraditionally taken before meals as a digestive bitter; no timing has been studied.
With food?Before food is the traditional pattern; switch to with food if it upsets your stomach.
Worth knowingSkip it entirely if you react to birch pollen, celery, carrot, ragweed or chamomile - mugwort is a major cross-reacting allergen and this is the most likely way it will cause you a problem.

Interactions

With medications

  • antiepileptic drugs such as valproate, levetiracetam or carbamazepine

    Thujone-containing preparations can lower the seizure threshold, working against seizure control. avoid entirely if you have epilepsy or take an antiepileptic

With other supplements

  • other thujone-containing herbs such as wormwood, sage or tansy

    Thujone exposure adds up, and it is neurotoxic at high cumulative intakes. do not stack thujone-containing herbs or use any of them long term

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Does mugwort cause vivid dreams?

There is no evidence that it does: no controlled human trial has tested mugwort for dreaming, sleep onset or sleep quality, so the dream-herb reputation rests on folklore and the evidence is limited.

Is mugwort safe?

Mugwort is a major allergen that cross-reacts with birch pollen, celery, carrot, chamomile and ragweed, and it must be avoided in pregnancy and while breastfeeding. People with epilepsy should also avoid it because thujone-containing preparations can lower the seizure threshold.

Does mugwort help digestion?

Mugwort has traditional use as a bitter tonic for appetite and digestion, but no randomised trial has tested it, so the evidence is limited. Traditional use is 0.5-2 g of dried herb as an infusion before meals.

Scientific references

Related in Sleep & relaxation

Herbal medicines: what the evidence says (335)