Irritable bowel syndrome (IBS) is one of the most common chronic functional intestinal disorders that impairing the sufferer's quality of life and patients with IBS constitute a great quantity of the load for the healthcare system. The pathogenesis and pathophysiology of IBS is complex and still incompletely clear. As an important factor for provocating or aggravating symptoms of IBS, dietary factor, especially dairy was associated closely with irritable bowel syndrome with diarrhea (IBS-D).
Lactose def...