If you’re looking for a simple way to help burn fat, you may be surprised to hear that there’s a special diet drink that can do just that. It’s called a ketone drink based on the ketogenic diet, which was first developed back in the 1900s but is getting new attention today.

You may notice that the ketogenic diet has a few similarities to the Paleo and Atkins diets, in that it focuses on lots of protein and very few carbohydrates. It gets its name from ketones, which are chemicals made from the fat your body burns up when it runs out of carbohydrates. But the drink takes it to a whole new level.

If you take a ketone supplement in drink form, it may help you achieve a constant state of ketosis which could help you drop weight. However, apparently it sure doesn’t taste very good, with a writer describing it as a foul-tasting syrupy drink.

“It’s really interesting; with a single drink of nutritional ketone you can do the same exercise with completely different metabolism,” says Dr. Pete Cox, a clinician at the University of Oxford and first author on the paper. “Given the findings of this study, which challenges our fundamental understanding of human physiology, it will be tempting for many to focus on pursuing the endurance and sport-related avenues, but it would be a great shame if the metabolic basis of this work was not further explored.”