This extreme substance, known as resiniferatoxin, doesn’t just rival the world’s spiciest peppers — it obliterates them. While a Carolina Reaper sits at around 2 million on the Scoville scale, resiniferatoxin is estimated to be 16 billion Scoville units, making it one of the most intense naturally occurring compounds ever studied.

This intensity makes it dangerous to consume, as it likely would cause intense, burning pain from just a microscopic dose. However, in controlled settings, researchers are investigating how it could permanently switch off specific pain pathways, offering relief for people living with severe, chronic conditions.