Come on…butter and oil in coffee for weight loss? Yes, butter and oil like any other fat make patients feel full so they probably don’t want to eat as much. But at around 400 calories per cup with the added butter and oil, bulletproof coffee and the bulletproof diet score a big nutritional zero. And not just any coffee, but patients must use one that is low in mycotoxins that supposedly grow on most supermarket coffee beans and are purported to cause weight gain. Get the facts on the Bulletproof Diet in our quick Food Fit Fabulous video.