Inclusion Criteria:  - function constipation by Romes criteria IV  Exclusion Criteria:  Abnormal liver or renal function (more than twice the normal upper limit of the research institute) Uncontrolled diabetes mellitus (>160 mg/dL of fasting blood sugar) Uncontrolled hypertension (>160/100 mmHg) Uncontrolled thyroid diseases. History of serious cerebro-cardiovascular diseases or cancer such as angina or myocardial infarction within 6 months History of structural abnormalities of colon within 4 year History of medication for probiotics and psychiatric diseases such as severe depression, schizophrenia, drug intoxication. Alcohol abuser Allergic reaction to this test food Those who participated in other drug clinical trials within 1 month from the screening date. Severe gastrointestinal symptoms such as heartburn and indigestion Those who are pregnant, lactating, or plan to become pregnant during the clinical trial Those who are judged to be unsuitable by the PI for other reasons