Clinical Research Directory

Inclusion Criteria: * Diagnostic Criteria (Refer to the "Expert Consensus on Diagnosis and Management of Childhood Obesity in China"): For children aged 2-5 years, refer to the "Growth Curve for Chinese Children and Adolescents Aged 0-18 Years" to determine the BMI cutoff points for overweight and obesity in Chinese children aged 2-5 years. For children aged 6-18 years, refer to the "Screening for Overweight and Obesity in School-Age Children and Adolescents" to determine the BMI cutoff points for overweight and obesity by age and gender in children aged 6-18 years. * Age: 3-14 years. * Fully informed consent: Parents or guardians have been fully informed of the clinical trial procedures, and both have signed the written informed consent form. Exclusion Criteria: * The child has chronic or severe systemic diseases. * The child has a family history of obesity-related metabolic or endocrine diseases. * The child has been diagnosed with psychological disorders or psychiatric diseases. * The child has used antibiotics or probiotic preparations within 4 weeks prior to enrollment. * The child was enrolled in other clinical studies 4 weeks prior to enrollment.