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 Are We Really 99% Chimp? The Science Behind Hot Spicy Foods How Could We Create A Second Earth? 8 New Toy Inventions every Kid will Love How Common Are Your Physical Traits? New Data: 60 Billion Planets Could Harbor Life!