The Fruit That Burns Off Calories


Ursolic acid, a waxy substance found in a certain fruit, may increase muscle and calorie-burning brown fat. Lab studies show that it may reduce your weight and lower your risk of fatty liver.

Ursolic acid is a waxy substance found in apple peels. Research at the University of Iowa shows that it may help boost metabolism by encouraging the growth of new muscle tissue.

“From previous work, we knew that ursolic acid increases muscle mass and strength in (lab animals), which is important because it might suggest a potential therapy for muscle wasting,” says researcher Christopher Adams. “In this study, we tested ursolic acid in (animals) on a high-fat diet — a mouse model of obesity and metabolic syndrome. Once again, ursolic acid increased skeletal muscle. Interestingly, it also reduced obesity, pre-diabetes and fatty liver disease.

“Since muscle is very good at burning calories, the increased muscle in ursolic acid-treated mice may be sufficient to explain how ursolic acid reduces obesity. However, we were surprised to find that ursolic acid also increased brown fat, a fantastic calorie burner. This increase in brown fat may also help protect against obesity.”


Carl Lowe

By Carl Lowe

has written about health, fitness and nutrition for a wide range of publications including Prevention Magazine, Self Magazine and Time-Life Books. The author of more than a dozen books, he has been gluten-free since 2007.