The mysterious death of Russian opposition leader Alexei Navalny has sparked international intrigue, with a deadly toxin at the center of the mystery. The UK and its European allies have accused the Russian state of deploying a rare and potent neurotoxin found in poison dart frogs, known as epibatidine. This toxin, isolated from the skin of the Ecuadorian poison dart frog, is 200 times more potent than morphine. It acts on nicotinic receptors in the nervous system, causing muscle twitching, paralysis, seizures, slow heart rate, respiratory failure, and ultimately death. The toxin's presence in Navalny's body, confirmed by European laboratories, suggests deliberate administration. However, the Russian government has dismissed these findings as an 'information campaign' aimed at diverting attention from Western issues. The toxin's rarity and the fact that it's not found naturally in Russia further fuel the controversy. The only known cases of epibatidine poisoning are laboratory-based and non-fatal, making this a highly unusual and concerning development in the case of Navalny's death.