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

Inclusion Criteria: Symptoms onset should start at least 6 months before diagnosis based on one or more of the following symptoms Rome IV criteria (Unpleasant postprandial fullness, early satiety, epigastric pain, epigastric burning sensation) No evidence of structural disease in gastroscopy within the last 3 months Aged 19-70 years Who meets Rome IV criteria for functional dyspepsia Who have 4 or more symptoms based on the gastrointestinal symptom rating scale Patients who voluntarily agree to participate in this study and sign a written consent Exclusion Criteria: Subjects who have a history of serious malignancy including gastrointestinal malignancy, cerebrovascular disease, and heart disease within the past 6 months were excluded Subjects who have uncontrolled diabetes and hypertension despite appropriate management Subjects who have a history of peptic ulcer or reflux esophagitis within the past 6 months were excluded Subject who have history of gastrointestinal surgery were excluded Women who are pregnant or breastfeeding Subjects who are taking drugs that may affect the gastrointestinal tract (minimum of 2 weeks washout period is necessary before participating in the trial (Medications include H2 receptor blockers, anticholinergics, prostaglandins, proton pump inhibitors, gastromucosal protection agents, corticosteroids, non-steroidal anti-inflammatory drugs, aspirin, mucosal protective agents, etc.) Subjects who are under drugs for therapeutic purposes such as functional food that promotes gastric health Subjects who consumed more than 14 times alcohol per week in case of man and 7 times per week in case of female in the past 1 month