What is the dart frog toxin allegedly used to kill Alexei Navalny?

The UK and its European allies allege that Alexei Navalny was killed using epibatidine, a rare and potent neurotoxin found in South American poison dart frogs. Traces of the toxin were reportedly found in Navalny's body after his death in a Siberian penal colony two years ago. Experts explain that epibatidine, more powerful than morphine, overstimulates nerve receptors, leading to paralysis, respiratory failure, and death. The allies assert that only the Russian state had the means, motive, and opportunity to deploy this toxin, which is not naturally found in Russia. The Kremlin has dismissed these findings as an information campaign.

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