Replacing your morning coffee’s dose of milk and sugar with a pat of butter to help kickstart your day into overdrive, according to advocates of the Bulletproof Coffee trend.

Bulletproof coffee, which is basically a cup of black coffee with grass-fed butter and medium-chain triglycerides (MCT) oil mixed in, was designed by the owner of Bulletproof Executive, Dave Asprey to supercharge your brain function and create effortless fat loss with no cravings.

Now, paleo dieters and grass-fed butter fanatics are adding the butter and oil combo to their morning javas.

“Bulletproof coffee is a great way to get healthy fats first thing in the morning,” says Kerry Bajaj, a Be Well health coach in New York City. “Starting the day with healthy fats provides energy, is good for cognitive function and supports your hormonal system.”

Butter from grass-fed cows supplies a healthier ratio of omega-3 to omega-6 fatty acids than what comes from conventionally raised livestock. MCTs are an unique form of fat that requires less energy and enzymes to be digested when compared to another type of fat known as long-chain triglycerides, says Bajaj.

There is some evidence that regular consumption of MCTs can induce very mild fat loss over time,” said Christopher Ochner, PhD, research associate at The New York Obesity Nutrition research centre.

“MCTs may also help regulate cholesterol levels, but the types of coconut oils and things from which people typically try to get MCTs often contain dangerous amounts of trans and saturated fats,” says Ocher.