The Study
Time-course changes in fluid balance following ingestion of a novel glycerol-electrolyte solution in a randomized trial.
This study tested if a special drink made your body hold onto water better than plain water. It found that, yes, for a few hours, you pee less and keep more water — but only in healthy people who were already not thirsty. It doesn't mean this drink makes you healthier or works for everyone.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Scientists tested a drink with glycerol and salts to see if it helps your body hold onto water better than plain flavored water.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 568 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1While the effect is real and measurable, it’s very small — like holding onto a few sips of water longer — and likely doesn’t make a big difference in daily hydration.
- 2The special drink made people keep 0.15% more fluid in their body and pee 112 grams less over 8 hours, with the biggest difference happening 2–4 hours after drinking it.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Scientific reports
Year
2026
Authors
Lindsay B. Baker, Jacquelyne Rea, Edwin Davidson, John Crosby, P. D. De Chavez, K. Osterberg
Related Content
Claims (6)
Drinks that contain electrolytes, carbohydrates, and food components hold more fluid in the body over four hours than plain water.
Drinking a glycerol-electrolyte solution leads to a 0.23% increase in net fluid balance and 159 grams less urine produced between 2 and 4 hours after consumption, showing that fluid retention peaks during this window and remains elevated.
Drinking 1 liter of a specific glycerol-electrolyte solution with 0.75% glycerol and 40 mmol/L sodium increases net fluid balance by 0.15% over 8 hours in healthy adults, but the change is small and does not result in meaningful hydration improvement.
Drinking a glycerol-electrolyte solution decreases urine production by about 112 grams over 8 hours compared to a flavored drink without glycerol or electrolytes, with the largest reduction happening between 2 and 4 hours after consumption.
Drinking a beverage with glycerol and electrolytes does not disrupt fluid balance in healthy adults over 8 hours, as the body retains more fluid than it loses and no negative effects were observed.
Drinking a specific 1-liter fluid with 0.75% glycerol and 40 mmol/L sodium causes a 0.15% greater increase in fluid retention over 8 hours than a flavored water placebo in healthy adults, because less urine is produced.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.