What is the name of the enzyme in grapefruit juice that is considered to be a fat burner?

The enzyme in grapefruit juice often associated with fat burning is called "naringin." This flavonoid is believed to enhance metabolism and influence fat metabolism, although its effects can vary among individuals. Grapefruit juice is also known to interact with certain medications due to its impact on liver enzymes, particularly CYP3A4. Thus, while naringin may have some benefits, it's important to approach its use cautiously, especially for those on medication.