Polygonatum Sibiricum Reduces Visceral Fat in Obese Adults

Inclusion Criteria: * Age 18 to 65 years, male or female; * Body mass index (BMI) ≥ 24 kg/m², or body fat percentage ≥ 25% for males or ≥ 30% for females, and visceral fat area ≥ 100 cm²; * Body weight stable within the past 3 months, with fluctuation not exceeding 5%; * Able to understand the study content, voluntarily sign the informed consent form, and willing to complete follow-up visits and required examinations as scheduled. Exclusion Criteria: * Secondary obesity (e.g., caused by endocrine disorders such as hypothyroidism, Cushing's syndrome, or polycystic ovary syndrome); * Previous metabolic surgery or current use of weight-loss medications; * Concomitant severe hyperglycemia or lipid metabolism disorders requiring immediate intensive treatment; * Concomitant severe cardiovascular or cerebrovascular disease, or unstable medical condition; * Significant hepatic or renal dysfunction (e.g., ALT or AST \> 2-3 times the upper limit of normal, or eGFR \< 60 ml/min/1.73 m²); * Malignant tumors, active infections, or autoimmune diseases; * Use of antibiotics, probiotics, or other agents that may affect gut microbiota within the past month; * Pregnancy, lactation, or plans for pregnancy; * Allergy to or intolerance of any component of the investigational product; * Any other conditions deemed unsuitable for participation in this study by the investigator.