You don't have to use oil in meridian brush, but it's very uncomfortable not to use oil when you operate violently. As for whether you can lose weight effectively, you have to say something else. On the one hand, although meridian brush's operation is simple, it needs professional theoretical knowledge where and how to brush, but Chinese medicine pays attention to one side and treats it according to syndrome differentiation; On the other hand, the topic of losing weight itself has not been really solved, and both Chinese and western medicine are still in the research stage. So although the weight loss market is so huge, professional doctors do less and laymen do more. This strange thing exists and deserves our deep thought. After all, nobody's money is blown by the wind, right?