Bullet Coffee has quickly become an international fad in recent months, being touted as an energy-boosting, low-carb breakfast replacement with myriad health benefits. Made up of coffee, butter and medium-chain triglyceride (MCT) oil – it supposedly provides long-lasting energy, improves focus and curbs hunger – many celebrities such as Shailene Woodley, Harry Styles and Bhumi Pednekar have taken to this energising beverage; but is it safe?

Bullet coffee poses many dangers, particularly its high level of saturated fats and calories per serving can skyrocket from zero to over 500. It should never replace healthy meals as its fats contribute to elevated cholesterol levels that could eventually lead to heart disease and other serious medical issues.

Notable to note is that MCT oil found in bullet coffee differs significantly from the fats found in avocados, nuts or seeds; there is little evidence suggesting that taking MCTs through coffee or butter consumption helps your body burn off more fat.

One major concern surrounding bullet coffee is its possible mycotoxin content. These toxins are produced when beans come into contact with fungal moulds during cultivation, leading to contamination with mycotoxins that may cause serious health complications from nausea to liver damage. Bulletproof only uses organic farms certified by Rainforest Alliance International who use methods proven to avoid mycotoxin contamination; furthermore they work closely with farmers so they receive proper training on avoiding mycotoxin contamination.

As with any high-calorie beverage, drinking bullet coffee for breakfast should be seen as a high-caloric intake, potentially leading to weight gain if replacing an earlier breakfast rich in carbs and fibre with this beverage. Diabetics must also avoid replacing balanced breakfasts with this drink due to increased blood glucose levels; rather they should combine their bullet coffee consumption with whole grain foods as well as fruits or vegetables as part of a nutritious morning routine.