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Artemisia Absinthium
A bitter digestive herb best known from absinthe. Two small Crohn's-disease trials found a steroid-sparing, TNF-alpha-lowering effect — genuinely interesting but tiny and unreplicated. Major safety caveat: it contains thujone, a neurotoxic monoterpene; avoid in pregnancy and seizure disorders.
What the evidence says
Most Wormwood studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality meta-analyses and randomised trials published 2004–2026 with a typical study size of 50 participants.
Based on 22 studies · 1 meta-analysis · 14 RCTs · 50 total participants
Confidence
Moderate confidenceBy outcome
An Emerging 4.5 reflects two small, same-group Crohn's RCTs showing steroid-sparing, TNF-alpha-lowering effects — promising but tiny, unreplicated, and offset by a real thujone safety ceiling.
18 rigorous studies
16 randomized trials · 1 meta-analyses · 1 systematic reviews
Our evidence rating for Wormwood is accountable to this entire body of rigorous research indexed in PubMed — not a hand-picked subset.
PubMed · as of Jul 2026
10 trials ongoing or recruiting · 31 completed on ClinicalTrials.gov
3 of the completed trials have posted results
Registered trials show research momentum for Wormwood, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Sep 2026
Wormwood (Artemisia absinthium) is an intensely bitter herb historically used to stimulate digestion and as the signature botanical of absinthe. Its bitter compounds (absinthin) are thought to stimulate digestive secretions, the classic 'bitter tonic' rationale.
The most notable modern evidence comes from two small German trials in Crohn's disease, where a wormwood preparation allowed steroid tapering and reduced the inflammatory cytokine TNF-alpha — a steroid-sparing signal.
These results are promising but come from very small samples (20-40 patients), have not been independently replicated, and involved a specific herbal preparation.
The dominant safety issue is thujone, a monoterpene in wormwood that is neurotoxic (convulsant) at high doses — the toxicity historically blamed for 'absinthism.' Modern thujone limits in food/beverages exist for this reason.
Wormwood should be regarded as an emerging digestive/anti-inflammatory herb with a real but small evidence base and a meaningful safety ceiling.
Wormwood extract lowered serum TNF-alpha in Crohn's patients, paralleling in-vitro reports of cytokine suppression — a plausible anti-inflammatory mechanism.
Bitter principles (absinthin) are traditionally thought to stimulate gastric and digestive secretions ('bitter tonic').
How Wormwood works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Avoid entirely — thujone exposure and traditional uterine-stimulant reputation.
Avoid — thujone is a convulsant and can lower seizure threshold.
Use caution; thujone metabolites are a theoretical concern.
Avoid due to cross-reactivity risk.
Thujone can lower seizure threshold and may oppose anticonvulsant control; avoid in people with seizure disorders.
Because trials used wormwood to taper steroids, any change to inflammatory therapy should be physician-supervised, not self-directed.
Tip: Reduce dose; take with a small amount of food
Tip: Do not exceed recommended doses; avoid prolonged high-dose use and high-thujone products
Wormwood has an evidence score of 4.5/10 — emerging evidence based on 20 indexed studies. A bitter digestive herb best known from absinthe. Two small Crohn's-disease trials found a steroid-sparing, TNF-alpha-lowering effect — genuinely interesting but tiny and unreplicated. Major safety caveat: it contains thujone, a neurotoxic monoterpene; avoid in pregnancy and seizure disorders. Representative study: PMID 17240130.
The commonly studied dose of Wormwood is Trial preparations used roughly 1.5-2.25g/day dried wormwood (divided); culinary/bitter doses are much lower. No validated general-use dose. Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take Wormwood is between meals. It can be taken on an empty stomach. Bitters are traditionally taken shortly before meals; thujone exposure should be minimized, so avoid high doses and prolonged use.
Wormwood should be used with caution — talk to a healthcare provider before taking it. Reported side effects are uncommon and include GI upset / nausea, neurological effects at high doses (restlessness, tremor, seizures). Use caution if any of these apply to you: Pregnancy and breastfeeding (thujone; emmenagogue/abortifacient tradition); Seizure disorders / epilepsy (thujone is a convulsant); Allergy to Asteraceae (ragweed, chamomile, marigold) plants.
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Reviewed by Dr. Baher Al Hakim · Last reviewed June 2026 · evidence from 24 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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