The so-called Bulletproof Coffee diet became a fad in about 2014. Invented by Dave Asprey, what is added to coffee to make it "bulletproof"?

The Bulletproof Coffee that Dave Asprey invented was inspired by a trip he took to Tibet, where he sampled yak-butter tea drinks. After coming back home, he first prepared a buttered coffee drink in 2009. In addition to drinking his concoction, the Bulletproof diet also include occasional fasting.

Asked by Tom Cohen · Last updated 5 years ago · 1.1K views