Bulletproof coffee is a high-fat coffee drink intended as a breakfast replacement. It's popular among people who follow a ketogenic diet. While it's filling and energy-boosting, it comes with several potential downsides, including reduced overall nutrient intake, increased cholesterol, and high levels of saturated fat.

Is Bulletproof diet good for you?

The Bulletproof Diet claims that it can help you lose up to a pound (0.45 kg) per day while gaining incredible levels of energy and focus. It emphasizes foods high in fat, moderate in protein and low in carbs, while also incorporating intermittent fasting.

Why is bulletproof coffee bad for you?

A bulletproof coffee can contain 2 tbsp of butter. This totals 14 g of saturated fatty acids, which is more than the AHA's recommended daily allowance. Consuming large amounts of saturated fat can raise the level of cholesterol in the blood. High cholesterol increases a person's risk for stroke and heart disease.