A Clinical Study to Evaluate the Effects of Akkermansia Muciniphila and Berberine on Prediabetes Among Obese Subjects.

Inclusion Criteria:

1. Aged 18-65

2. Overweight/obesity (24.0≤BMI≤40.0 kg/m^2)

3. Fasting blood glucose ≥6.1 and <7.0 mmol/L, or 2-hour postprandial blood glucose ≥7.8 and <11.1 mmol/L, or glycosylated hemoglobin ≥5.7% and <6.5%

4. Fertile subjects (including male and female subjects) agreed to take effectivecontraceptive measures that the investigator accepted during and within 3 monthsafter the trial (e.g. intrauterine device or a condom); the fertile female subjectswith serum human chorionic gonadotropin test negative results within 7 days beforethe investigational product administration; Infertile female must be surgicallyinfertile or at least 1 year after menopause.

5. Subjects should understand the nature, significance, potential benefits,inconvenience and risks of the study before the trial begins, fully understand andvoluntarily sign the informed consent.

Exclusion Criteria:

1. Subjects who diagnosed with diabetes mellitus, medical obesity (excluding those whohave been off medication for more than 1 year), or other secondary diabetes mellitus (e.g., Cushing's syndrome, thyroid dysfunction, or acromegaly);

2. Subjects who has undergone bariatric surgery;

3. Subjects who has acute or chronic progressive or unstable disease, liver and kidneyinsufficiency, serious cardiovascular and cerebrovascular diseases;

3.Subjects with acute diabetic complications such as diabetic ketoacidosis or diabetic hypertonic coma within within latest 3 months; 4.Patients with hemolytic anemia or glucose-6-phosphate dehydrogenase deficiency; 5.History of intestinal or intestinal surgery within 1 year, or non-gastrointestinal surgery within 6 months; 6.Excessive alcohol consumption in the last 10 years (more than 30 g/ day for male and 20g/ day for female) 7.Pregnant or lactating subjects 8.Subjects that the investigator considers need to excluded due to other causes.