Trying to lose weight? According to one study eating half a grapefruit before each meal may help you slim down faster thanks to the fruits fat burning properties and its beneficial effect on blood sugar and insulin levels. Grapefruit is also hydrating filling and packed with immunity boosting antioxidants. For a well rounded breakfast pair it with proteinsuch as yogurt or an egg Giovinazzo suggests. But check with your doctor first if you take any medications as grapefruit and grapefruit juice can interfere with some prescription drugs.