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Stirring butter into your coffee sounds delicious, but the supposed health benefits are questionable.
Here’s what the science says about this trendy keto beverage.

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People following aketogenic or low-carb, high-fat diethave also been in on the trend.
But what is bulletproof coffee, exactly?
But are any of these claims really true?
Here’s what an expert has to say, based on the evidence.
Why Does Bulletproof Coffee Include MCT Oil?
Specifically, you’re meant to use a mix of grass-fed butter and MCT oil.
One tablespoon of theMCT oil that Bulletproof sellscontains 130 calories and 14 grams of saturated fat.
So, what’s special about this particular pop in of fat?
What about Grass-Fed Butter?
And it typically contains more omega-3 fatty acids than conventional butter.
The amount ofomega-3salso doesn’t come close to that in, say, salmon.
Is It Healthy to Have That Much Saturated Fat in Coffee?
Either way, a single cup of bulletproof coffee puts you at or well above the limit.
Is that a good idea?
“The short answer is no,” McGrane says.
Can Bulletproof Coffee Improve Your Metabolism, Your Mood or Your Health?
But are any of these evidence-based?
“Most of the claims surrounding bulletproof coffee are due to the MCTs in it.
Is Bulletproof Coffee a Nutritious Breakfast Choice?
That alone should raise alarm bells for anyone who understands basic nutrition.
“Plus, bulletproof coffee is very high in calories and saturated fat, which can be problematic.”
While fat is important for satiety and fullness, protein and fiber play a role in this as well.
It’s possible that the high-calorie breakfast drink wouldn’t fill you up the waya more balanced breakfastmight.