Inclusion Criteria:  BMI>=30kg/m2,or percent of body fat(PBF) >=25% for male, >=30 for female. Age: 18 - 60 years old adults  Exclusion Criteria:  patients with severe chronic diseases (coronary heart disease, diabetes, hypertension, immune deficiency, mental disorders, tumors, liver and kidney dysfunction, etc.) and complications;irritable bowel syndrome History of intervention with fat-reducing drugs or health products in the past 2 months take weight control measures (diet, exercise, etc.) within the past month Those who cannot guarantee to maintain their current lifestyle during the trial period Those who fail to consume the tested samples as required, or fail to follow up on time, resulting in failure to determine the efficacy