This study aims to investigate the effects of Chinese herbal granule preparations on improving gastrointestinal symptoms in patients after bariatric surgery. It seeks to establish a novel treatment model that combines bariatric surgery with traditional Chinese medicine, providing clinical practice with additional evidence-based medical support.

Inclusion Criteria:

1. BMI ≥ 27.5 kg/m²;
2. Undergoing metabolic bariatric surgery;
3. Traditional Chinese Medicine syndrome differentiation classified as Spleen Deficiency and Excess Dampness syndrome.

Exclusion Criteria:

1. Contraindications for metabolic bariatric surgery;
2. Type 1 diabetes;
3. Complicated by other significant systemic diseases, such as severe liver and kidney diseases, malignant tumors, psychiatric disorders, etc;
4. Concurrent use of other medications or treatments that may affect body weight, such as metformin, semaglutide, endoscopic interventions, etc;
5. Pregnant or lactating women.