Allan Nascimento, UFC fighter, died in his sleep at age 34 from an apparent heart attack 💔

Por Juan Pablo González
4 August, 2026

Allan Nascimento, 34, nicknamed ‘Puro Osso,’ was sleeping at his home in São Paulo, Brazil, when his heart simply stopped. 💔

His family found him on the morning of Monday, August 3. Medical personnel arrived quickly, but there was nothing they could do. The UFC confirmed his death in an official statement that left the MMA community in shock.

Just six weeks earlier, Allan had stepped into the octagon in Las Vegas. A jiu-jitsu black belt with 4 wins and 2 losses in the UFC, he trained side by side with Charles Oliveira himself at the Chute Boxe Academy. Nothing indicated that his heart would betray him while he slept. 😔

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