Participants will start consuming hydrogenated water on the 16th day of the menstrual cycle and will continue to apply it until the 2nd day of the next cycle. Within the scope of the study, they will be asked to drink of 300-400 ml hydrogenated water each morning before breakfast; 300-400 ml an hour before lunch; 300-400 ml two hours after lunch; 300-400 ml an hour before dinner; 300-400 ml half an hour before going to bed. Participants will be asked to consume a minimum of 1500 ml (1.5 L) and a maximum of 2000 ml (2.0 L) hydrogenated water in total. In this way, participants will be provided with hydrogenated water for three cycles.

The Premenstrual Syndrome Scale (PMSS) consists of 44 questions. The PMSS is Likert type and its items are scored between 1 and 5 points. Lowest points of 44 and highest points of 220 can be obtained on the PMSS. The scale has a total of 9 subscales: depressive feeling, anxiety, fatigue, irritability, depressive thoughts, pain, changes in appetite, changes in sleeping habits and swelling. A higher score on the scale indicates that the severity of premenstrual syndrome is high.

The brief version of the World Health Organization Quality of Life (WHOQOL-BREF) is a sound, cross-culturally valid assessment of health-related quality of life in adults populations. Its assessment shows good to excellent internal consistency, test-retest reliability, discriminant validity, content validity, and construct validity in the healthy population and in different patient groups. Each question is scored from 1 to 5, with scores ranging from 0-100. A higher score means better quality of life.