This Mediterranean oil is rich in cancer-fighting polyphenols and heart-strengthening monounsaturated fats, including oleic acid. This fat’s help in getting you lean is backed by some pretty strong facts: A recent study from Obesity found that an olive-oil-rich diet resulted in higher levels of adiponectin than did a high-carb or high-protein diet. Adiponectin is a hormone responsible for breaking down fats in the body, and the more you have of it, the lower your BMI tends to be. Another reason for you to use this lipid in your dressings and sauces: extra virgin olive oil may increase blood levels of serotonin, a hormone associated with satiety.
Heavy Cream and Milk
Got fat? While full-fat dairy packs more calories, it’s also more filling. That may help explain why a 2013 study review in the European Journal of Nutrition found that people who eat the fatty stuff are less likely to suffer from obesity than those who try and skip the calories and fat with low-fat dairy. The study authors also found no ties between full-fat dairy and heart disease or diabetes. Ironically, some acids in milk fat—ones you don’t get from zero-fat varieties—may crank up your body’s calorie-burning centers, says study coauthor Mario Kratz, Ph.D., an epidemiologist at the University of Washington. So pour some heavy cream in your next cup o’ joe. “Heavy cream is a healthy fat that helps keep your blood sugar stable between meals and snacks, which means consistent energy and brain power—not to mention it makes your coffee taste decadent!” says nutritionist Cassie Bjork, RD, LD.