The burning sensation from euphorbia honey is a genuine chemical effect of the plant's compounds, not an impression.
Euphorbia resinifera produces resiniferatoxin, an extremely potent activator of the same receptor that capsaicin acts on and considerably more powerful. Trace transfer into the nectar and hence the honey is the accepted explanation for the burn. The quantity present in honey and the dose-response relationship have not been thoroughly characterised in published work.
What this does not claim: This does not claim the honey is dangerous at culinary quantities, nor that it has therapeutic value. It also does not claim every jar behaves identically — the intensity varies considerably.
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