Butter coffee, often marketed as Bulletproof coffee, combines brewed coffee with butter or ghee and usually medium-chain triglyceride oil. The ingredients are blended to disperse the fat and create a creamy texture. CoffeeBox links the drink's popularity to low-carbohydrate diets and the version promoted by Dave Asprey. Its composition is different from an ordinary black coffee or a coffee with a small splash of milk.
The added fats change the beverage's nutritional content substantially. The exact energy and saturated-fat amounts depend on the measured ingredients, so check the labels and portions rather than treating one advertised recipe as universal. MCT oil and coconut oil are not identical products. A creamy texture, a feeling of fullness or association with a particular diet does not establish a weight-loss benefit.
Cleveland Clinic's dietitian guidance notes that butter, oil and coffee do not form a balanced breakfast and that evidence does not support broad promotional claims. Someone managing cholesterol, diabetes or digestive symptoms should discuss substantial dietary changes with their clinician or dietitian. This overview explains what the drink contains; it does not recommend replacing meals, prescribe a diet or promise improved focus, metabolism or health.

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