What is Bulletproof Coffee?

Adding butter to coffee is the latest diet fad. Is this a healthy habit or simply hype? Nutrition Diva sorts through the claims.

Monica Reinagel, MS, LD/N, CNS
5-minute read
Episode #240

Ryanne Gallagher: MCT oil is made by processing coconut and palm kernel oils to change the chemical structure, making them more easily digested and absorbed. Some people promote MCTs as a weight loss aid, but in your podcast on MCTs, you pointed out that studies testing the effect in humans have been disappointing so far.

See also: What are MCTS?

Is There Any Downside to Bulletproof Coffee?

Nutrition Diva: So it sounds as if some of the claims for Bulletproof Coffee might be a little exaggerated. But maybe some of our listeners are intrigued enough to try it for themselves. It’s always fun to try something new and—hey—there’s always the chance of a good placebo effect! But before people get online and start ordering yak butter, is there any potential downside we should consider?

Ryanne Gallagher: Asprey and others in the Paleo movement advocate a diet high in fat and saturated fat. Obviously, a lot of nutrition professionals (and cardiologists) would disagree with that advice. If your goal is to keep your fat intake within the generally recommended ranges, keep in mind that a batch of bulletproof coffee contains 2/3 of your total daily fat allowance and 200% of the recommended amount of saturated fat.

Nutrition Diva: Thanks, Ryanne, for the great work you did looking into this for us. I know all the Nutrition Diva listeners join me in wishing you all the very best in your nutrition career and we hope you won’t be a stranger!

I’ve posted some of the sources that Ryanne turned up in her research below if you’d like to investigate further.

What do you think of this new diet fad? Please weigh in with your comments and questions, either below or on the Nutrition Diva Facebook page.


Bulletproof Executive (Dave Asprey’s website)
Fats and Satiety (Available from National Library of Medicine)

Mug and Cream images from Shutterstock


About the Author

Monica Reinagel, MS, LD/N, CNS

Monica Reinagel is a board-certified licensed nutritionist, author, and the creator of one of iTunes' most highly ranked health and fitness podcasts. Her advice is regularly featured on the TODAY show, Dr. Oz, NPR, and in the nation's leading newspapers, magazines, and websites. Do you have a nutrition question? Call the Nutrition Diva listener line at 443-961-6206. Your question could be featured on the show.