Hydrogen Water Intervention With Heart Rate Variability as an Outcome Biomarker in ME/CFS

The goal of this clinical trial is to learn if the OTC supplement, hydrogen water, works to treat the fatigue-related symptoms and functional limitations in adults with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). It will also examine if heart rate variability (HRV) can be used to predict who will benefit from the hydrogen water treatment. The main questions it aims to answer are: Does the OTC supplement, hydrogen water, work to reduce the fatigue-related symptoms and improve functioning in participants who have ME/CFS? Can HRV be used to predict who will benefit from treatment with hydrogen water?