Initially, I also thought, 'Wouldn't just taking the medicine be enough?' But after some trial and error, I realized that herbal medicine works by addressing the body's root causes. On the plus side, it can regulate issues like spleen deficiency (脾虛) or phlegm-fluid (痰飲), improving digestive function and helping eliminate excess water and waste. Depending on your constitution, it may also suppress appetite or prolong feelings of fullness, making it a good starting point for those who struggle with dieting alone. However, there are clear drawbacks. Without any dietary control, if you maintain a calorie surplus, the effects of the medicine are easily offset. Even if metabolism increases, weight loss may be minimal or nonexistent if food intake remains unchanged. Moreover, stopping the medicine abruptly often leads to rebound weight gain as old eating habits return, especially if underlying factors like blood stasis (瘀血) or qi stagnation (氣滯) are not addressed. In conclusion, losing weight 'without any dietary changes' is realistically difficult. However, rather than extreme fasting or harsh diets, herbal medicine can first stabilize the body's condition, often making natural dietary regulation easier. Therefore, when you visit a clinic, it is best to assess both your constitution and lifestyle together to find the most realistic and sustainable approach.