The primary aim of this study is to is to determine if a diet (TCM-FMD) which combine fasting-mimicking diet (FMD) with "dispelling dampness" meal replacement (a meal replacement made up of traditional Chinese medicine) is the effective dietary strategy for treatment of phlegm-dampness type overweight/obese patients. A three months randomized trial will be used to observe weight loss generated by TCM-FMD and FMD. And a group keeping a normal diet will be set as a blank control. Through comparison, we aim at examining the effects of interventions on weight and metabolic disease risk factors (plasma lipids, fasting glucose, blood pressure) The secondary aim of this study is to evaluate the safety of TCM-FMD.