>>11380515>pyrrolizidine alkaloidshttps://www.ncbi.nlm.nih.gov/pubmed/21360377Foud PAs in honey. The putative origin was Echium species,
https://en.wikipedia.org/wiki/Echiumendemic to
North Africa, mainland Europe to Central Asia and the Macaronesian islands,.
The fact is the LD50 is 1.8g/kg in rats. Thats going to be a gigantic amount of honey one would have to consume to reach that level in PAs.
The truth is the constituents in any honey are going to be a consequence of many factors, including where they foraged for pollen.
But what about Grayanotoxins -?- are in MUCH more common plants:
>produced by plants in the family Ericaceae, specifically members of the genera Rhododendron, Pieris, Agarista and Kalmia.[3] The genus Rhododendron alone encompasses over 750 species that grow around the world in parts of Europe, North America, Japan, Nepal and Turkey. Is it dangerous? MAYBE
https://en.wikipedia.org/wiki/Grayanotoxin#Mad_honey_intoxicationalso, fatally:
>One of the earliest accounts of mass poisoning dates back to the first century BCE when Roman troops were allegedly poisoned with honey by the Heptakometes of Turkey. The Roman soldiers were reported to be confused and vomiting and subsequently defeated in battle after eating the honey. We now believe that they were given honey made from the nectar of the flowering plant Rhododendron luteum. 
