<strong>Grapefruit</strong><br />Water content: 90.5%<br /><br />This juicy, tangy citrus fruit can help lower cholesterol and shrink your waistline, research suggests. In one study, people who ate one grapefruit a day lowered their bad (LDL) cholesterol by 15.5% and their triglycerides by 27%. In another, eating half a grapefruit -- roughly 40 calories -- before each meal helped dieters lose about 3½ pounds over 12 weeks. Researchers say compounds in the fruit help fuel fat burn and stabilize blood sugar, therefore helping to reduce cravings.<br />