Apple Cider Vinegar Tonic 1 This weight-loss tonic might help you slim down, even though it's not a quick fix for healthy habits. Apple cider vinegar's sour flavor (the acetic acid) may help you eat less and stay more satisfied. Green tea has caffeine and antioxidants that may help boost fat loss. Ginger might help you burn more calories. And maple syrup adds a touch of natural sweetness to this hydrating drink. Add this tonic to your diet in addition to sensible eating and exercise to help boost your weight-loss efforts.