Approximate calorie count: 130 caloriesLimes are good for weight loss because of the citric acid — a metabolism booster. "Mint is a huge flavour contributor with less than a calorie in a 100g serving, so the more the merrier," says Roxanne. Blueberries are key to making this drink! "Berries are great for regulating the fat-burning gene, as well as lowering high blood pressure," says Roxanne.