Can a special drink keep you more hydrated than water?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Female and male adults aged 18-50 years. 2. Body mass index (BMI) between 18.5 to 25 kg/m² (inclusive). 3. Healthy as determined based on self-reported medical history. 4. Able to understand and to sign a written informed consent prior to study enrolment. 5. Willing and able to comply with the requirements for participation in this study. Exclusion Criteria: 1. Any past or on-going diagnosed medical/surgical condition (e.g. malignancy, renal condition, liver condition, uncontrolled diabetes mellitus, cardiovascular disease, hypertension, migraine and headache disorders) and/ or psychiatric condition (e.g. depression, psychotic disorders, chronic insomnia, eating disorder), which in the opinion of the site physician/investigator may risk participant's well-being/safety, impede participant compliance with study procedures or ability to complete the study and/or could confound the primary objectives of the study. 2. Current intake of medication/s that impact hydration status (e.g. anti-hypertensive medications, anti-diabetic medications, anti-psychotics, anti-depressants, diuretics, laxatives, antidiuretic hormone (ADH) antagonists, oral corticosteroids, glucocorticoids, anti-cholinergic medications, or cyclosporine A). 3. Currently on a high-protein (1.5g/kg/BW/day) or ketogenic diet (based on self-report). 4. Known/suspected food allergy or intolerance to any food (based on self-report). 5. Female participants who are pregnant, lactating and/or breastfeeding (self-report or if in doubt, via urine pregnancy test). 6. Any self-reported chronic alcohol or drug abuse within the past year; specifically, an average alcohol intake \> 2 standard drinks per day over a week for males, and \> 1 standard drink per day over a week for females. One standard drink contains 10-12 g of ethanol, i.e., 0.3 dl of strong alcohols, 1dl of wine, 3 dl of beer. 7. Currently participating in another interventional study. 8. Family or hierarchical relationships with the research team members.