About Horse-heal / Elfdock
Inula helenium root contains sesquiterpene lactones (alantolactone, isoalantolactone, ~1–4%) and inulin (a fructan, often >40% by weight). Traditional uses: respiratory expectorant for chronic bronchitis and cough; historical anthelmintic against intestinal parasites (alantolactone has documented in-vitro activity against Ascaris). No modern RCTs in humans for any indication. SAFETY: alantolactone is a known contact allergen — sesquiterpene-lactone cross-reactivity with the Asteraceae/Compositae family (ragweed, chamomile, echinacea). Contact dermatitis is documented. Contraindicated in pregnancy (potential uterine stimulant) and nursing. May potentiate sedatives/hypotensives in theory. Inulin content can cause GI bloating/flatulence in FODMAP-sensitive users.
What Horse-heal / Elfdock supports
- Traditional/folk use as an expectorant; no modern RCTs in humans
- Contact allergen risk, especially in those sensitive to ragweed/Asteraceae
How much Horse-heal / Elfdock to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
1500–4000
mg
German Commission E and ESCOP-style traditional dosing: 1.5–4 g dried root/day as infusion or decoction. No modern RCTs to confirm. Capsule doses on supplement labels (50–200 mg) are folk-symbolic, not therapeutic.
Clinical evidence
Limited clinical evidence. Traditional/ethnobotanical use and Commission E monograph only; no human RCTs. Alantolactone allergenicity well-documented.
Reference