Perplexity AIBulletproof coffee, also known as butter coffee or keto coffee, is a high-calorie drink made with added fats, intended to fuel your start to the day. It was created by Dave Asprey, the originator of the Bulletproof Diet, and is popular among low-carb dieters and those following a ketogenic diet. The drink consists of coffee made from high-quality beans, unsalted butter, and a medium-chain triglyce
