Human saliva is six times stronger than morphine Researchers have discovered a natural painkiller that’s six times more powerful than morphine, and it’s produced by human saliva. It’s called opiorphin — here’s what you need to know. Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts How Olympic Athlete’s Bodies Have Changed Over the Years Can Light Turn Objects Invisible? Can You Actually Get Sick From Being Cold? The Bizarre Plan to Drain the Mediterranean: Atlantropa What Did Prehistoric Humans Actually Eat? Are there universal expressions of emotion?