The Effects of Soy Dietary Fiber in Adults With Diarrhea Predominant Irritable Bowel Syndrome

The Effects of Soy Dietary Fiber in Adults With Diarrhea Predominant Irritable Bowel Syndrome: Double-blind, Randomized, Placebo-controlled, Cross Over Clinical Trial

The investigators will evaluate the efficacy of soy dietary fiber in adults with diarrhea predominant irritable bowel syndrome.

Inclusion Criteria:

• willing to consent/undergo necessary procedures
• between the age of 19 and 75 years
• diarrhea predominant irritable bowel syndrome (satisfied with Rome II criteria)

Exclusion Criteria:

• uncontrolled hypertension (Blood pressure > 170/100 mmHg)
• uncontrolled diabetes mellitus (FBS > 180 mg/dL)
• malignancy, cerebrovascular disease, cardiovascular disease
• history of abdominal surgery except appendectomy and hernia repair
• inflammatory bowel disease
• clinically or laboratory-confirmed gastroenteritis
• the use of motility drug or dietary fiber supplement in 2 weeks
• allergy to soy fiber
• serum Cr > 2 x Upper normal limit
• AST or ALT > 2 x Upper normal limit
• Pregnancy, Lactating woman