Mountain laurel honey can contain grayanotoxins and cause poisoning.
Grayanotoxins from ericaceous nectar are well characterised and cause dizziness, nausea, vomiting, low blood pressure and cardiac arrhythmia. Poisoning cases from Kalmia and Rhododendron honey are documented in the North American and European clinical literature. The toxin cannot be reliably detected by appearance or taste, and heating does not remove it.
What this does not claim: This does not claim all honey from Appalachian apiaries is affected — the great majority is not, because beekeepers manage around the flow. It also does not claim mountain laurel harms bees; adult honey bees are unaffected.
- Council Directive 2001/110/EC relating to honey — Council of the European Union (2001) · Regulatory guidance Link
- HoneyHQ editorial synthesis — HEKNO Ltd · HoneyHQ synthesis