Dave Asprey is the genius behind the Bulletproof Diet/Coffee Craze. He invented the bulletproof coffee recipe by trial and error. He finally determined that adding up to 6 tablespoons of butter in his coffee and 2 tablespoons of medium chain triglyceride oils to his morning cup of coffee helped him focus, kept him from being hungry, and satisfied his longing for a caffeine pick me up. The drink can contain more than 460 calories! He discovered that it is not only a drink, it’s a meal replacement. There is no doubt that cream and sugar added to coffee increases calories, but adding pure home grown butter amps up the fat content considerably.