Validation of the portable MX3 hydration testing system for measuring saliva osmolality

Saliva, specifically salivary osmolality, has gained increasing interest as a non-invasive hydration marker providing rapid results that can be easily obtained in a field setting. However, it is unclear as to whether commercially available hydration devices can accurately measure salivary osmolality. Thus, this study assessed the validity of the MX3 Portable Hydration device against a laborator...