The purpose of this study is to determine whether Yili "Chang Qing" Pro-ABB yoghurt is effective in improving mild constipation and the intestinal micro-ecology environment & alimentation.

Inclusion Criteria:

1. Male or female subjects, 25-45 yrs;
2. Non-specific and/or moderate constipation;
3. Irregular or occasional gastrointestinal disorders (flatulence, gurgling, feeling heavy after eating, abdominal pain);
4. Slow transit or irregular bowels movements (abnormal feces solidity, bowel movements decreased, e.g. every 2-3 days or less than 3 times per week).

Exclusion Criteria:

1. Diagnosed as chronic constipation;
2. Treated gastrointestinal symptoms;
3. Lactose Intolerance;
4. Treatment by analgesic such as aspirin and paracetamol;
5. Had laxatives or other remedies to promote digestion 2 weeks prior to the study start;
6. Consuming dairy products or supplements containing pro/pre-biotic 10 days prior to the study start;
7. Currently suffering from diarrhea.