Improvement of Functional Dyspepsia After Drinking Alkaline Ionized Water From Alkaline Ionizer

Patient will be allocated randomly to two groups: EARW and PW groups. For 6 weeks, patients drink water (10mL/kg body weight/day ) generated from the device installed in the house before starting intervention. Patients will be instructed to drink in empty stomach, and to drink immediately after generation of water. The total amount that the patient drank the day before will be monitored by a researcher using survey form of mobile phone everyday.