At present, leeches can only treat stroke, hypertension, blood stasis, amenorrhea, traumatic injury and so on. It is better to lose weight with a certain diet and moderate exercise. If you have to try this recipe, you'd better dry the leeches and powder them, otherwise it will be miserable (ps: losing weight by foreign objects is not good for your health, but it is better to rely on exercise. You can check the exercise methods online, for example, I just rely on pilates and aerobic exercise.