Good news for all you chocoholics! Chocolate can help flatten your belly—dark chocolate, that is. Dark chocolate contains the highest percentage of pure cocoa butter, a source of digestion-slowing saturated fat called stearic acid. Because dark chocolate takes more time to process, it staves off hunger and helps you lose weight. Besides the healthy fats, dark chocolate comes packed with antioxidants, principally polyphenols including flavonoids such as epicatechin, catechin and notably the procyanidins, which can help fight off free-radicals and improve blood flow to the brain (which might make you smarter!). A recent study published in the Journal of Psychopharmacology found that a few ounces of dark chocolate a day is all you need to reap the benefits.
Go nuts! Polyunsaturated fats in nuts activate genes that reduce fat storage and improve insulin metabolism. At about 13 grams per one-ounce serving, walnuts are one of the best dietary sources (they also have more omega-3 fatty acids than any other nut). A small Pennsylvania State study found that a diet rich in walnuts and walnut oil may help the body respond better to stress and can also help keep diastolic blood pressure levels down. And it’s not just walnuts, a study from the International Journal of Obesity and Related Metabolic Disorders found that even when two groups of participants consumed the same amount of calories, the group which had more calories from fatty almonds lost the most weight. When it comes down to it, all nuts will be great sources of monounsaturated, polyunsaturated, and omega-3 fats, just in varying amounts. If you’re looking to slim down, read our essential guide to the 6 Best Nuts for Weight Loss.