Can Adding Butter to Your Coffee Help You Lose Weight?

"Bulletproof Coffee" creator Dave Asprey claims adding healthy fats to coffee promotes weight loss.
1:53 | 08/27/14

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Transcript for Can Adding Butter to Your Coffee Help You Lose Weight?
Thank you. We'll take a look at a counterintuitive coffee trend called bulletproof coffee. Adding butter and Rachel smith investigates that claim. Reporter: Hold the cream and sugar. The growing trend in that morning cup of Joe, butter and oil. It's called bulletproof coffee. The ingredients, clean coffee, two tablespoons of un-sauled grass fed butter and two tablespoons of coconut oil. It is very strong. Especially up here. The creator, Dave Asbury claims his concoction high in healthy fats increases energy, immunity and cognitive function and even promotes weight loss. The question, is there enough proof to go bulletproof. We don't have enough research to support it being something good for us in the long term. Reporter: Let's weigh the Numbers. One cup of bulletproof coffee contains 460 calories equivalent to a fast food double cheeseburger and 52 grams of fat or the same amount found in 12 medium eggs meaning bulletproof may not be the most failproof weight loss strategy. Really transforming their entire diet to accommodate so much fat, I doubt it. Reporter: I took the bulletproof coffee to an L.A. Cafe for a taste test. Cheers. It's oily. It's really good. Not for me. Fantastic. Reporter: "Good morning America," Rachel smith, ABC news, Los Angeles. Okay, so I want to but I'm looking down at it. It's green. It looks kind of like chicken noodle soup. If I want butter it's in a baked potato. That's a thrilling cup of coffee. Let me wipe the grease off my lip. Do you have for energy. No, but I feel a little more slippery. Natural lip gloss.

This transcript has been automatically generated and may not be 100% accurate.

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