Diet Intervention on Obesity Related Complication

Inclusion Criteria: 1. Obtain informed consent before carrying out any trial-related activity, which is any procedure carried out as part of a trial, including the identification of activities suitable for the trial 2. Men and premenopausal women, ages 18-65 at the time of signing the informed consent form 3. Obese patients are diagnosed based on a body mass index (BMI) of 28-40kg/m2 Exclusion Criteria: 1）Patients who do not possess or lose the ability to make their judgment, are unable to understand the purpose of the study, or are unwilling to cooperate with it; 2) Heart, liver, kidney dysfunction，and systemic diseases, such as various malignant tumors, systemic allergic diseases, and autoimmune diseases; 3）Drug or alcohol dependence, intellectual disability, mental disorders; 4）Pregnant and lactating women; 5) Confirmed Helicobacter pylori infection (PPI, bismuth, and antibiotics were stopped for at least 4 weeks, and any of the following tests were positive: non-invasive HP test such as urea breath test, monoclonal stool Helicobacter pylori antigen test, serum soluble Helicobacter pylori antigen test; Invasive Hp test included rapid urease test and tissue section staining); 6）diagnosis of acute gastric mucosal lesions; 7）the patient was diagnosed with chronic gastritis according to the new Sydney system visual simulation scoring method and the pathological diagnostic criteria of chronic gastritis in China; 8） histological and imaging examinations, adenocarcinoma was diagnosed.