This study was designed as a randomized, parallel, double-blind controlled clinical trial. Enrolled patients with FD will be allocated randomly into two groups: EARW group and PW group. For 6 weeks, the patients will drink EARW and PW (10mL/kg/day body weight) in empty stomach condition. For the primary outcome measure, the gastrointestinal symptom rating scale (GSRS) will be used, and for the secondary outcome measure functional dyspepsia-related quality of life (FD-QoL), and Korean version of the Nepean Dyspepsia Index (NDI-K) will be used at baseline and at 6 weeks.
The goal of this clinical trial is to evaluate the effect of drinking electrolyzed alkaline reduced water (EARW) compared to drinking purified water (PW) on functional dyspepsia (FD) patients.~The main question[s] it aims to answer are:~Drinking EARW (EARW group) will alleviate gastrointestinal (GI) symptoms and FD symptoms compared to drinking PW (PW group).~Drinking EARW will make higher the FD-related Quality of Life (FD-QOL) compared to drinking PW.~Patients will drink EARW 10mL/kg/day body weight for 6 weeks according to the instruction of researcher using the experimental device installed at each patient's house. After 6 week, EARW and PW groups will be compared to evaluate effect of GI symptom and FD-related QOL.