Assertion: arnica's sesquiterpene lactone | /r/HasProperty | helenalin
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Source sentences:
text: Homeopathic doses of arnica are unlikely to result in any adverse reactions because of the small amount ingested15; however, a case report exists of toxic optic neuropathy following ingestion of homeopathic arnica.62 Oral ingestion of arnica (eg, tincture, flowers, roots, rhizomes) has caused stomach pain, diarrhea, and vomiting and irritates the mucous membranes, although no adverse events have been reported in clinical trials.2, 15, 38 Numerous cases of allergy and contact dermatitis related to arnica have been described; sesquiterpene lactones helenalin, helenalin acetate, and helenalin methacrylate are the primary sources of contact dermatitis.
text: Arnica formulations contain anti-inflammatory ingredients like flavonoids and sesquiterpene lactones (helenalin).
text: Several species of arnica, including A. Montana, contain two sesquiterpene lactones: helenalin and dihydrohelenanin, which help reduce inflammations and ease pain.