Carbonated mineral water 1.5 L/day,
does it really help with Improved functional dyspepsia and early satiety?
research showsThe grade is C. In a 21-person double-blind randomized trial, the dyspepsia score in the carbonated-mineral-water arm fell from 7.9±2.8 to 5.4±1.7, but an appropriate between-group treatment effect and confidence interval were not reported. This was a 15-day producer-supported small trial, and actual 1.5-L intake was not verified with urinary measures, so magnitude cannot be judged.
ads claimThe presence of carbonation and bicarbonate is a compositional fact, not proof that dyspepsia improves. Any marketing citation should disclose the 21-person, 15-day design and missing between-group estimate.
Useful facts when choosing a product
- The trial prescribed 1.5 L/day in both groups, comparing carbonated mineral water with tap water at equal nominal volume.
- A later review identified the intervention as Uliveto and classified funding as coming from the mineral-water producer or seller.
- The 1945 1 mL/kcal recommendation concerned total water from foods and all beverages, not a claim that eight glasses of plain water improve digestion.
Chamgap Semantic Classification Code
Candidate index · review held
S.of-carbonated-mineral-water.UNK.functional-dyspepsia-and-early-satiety.improve.UNKSupplements and nutraceuticals > of carbonated mineral water > Unknown > functional dyspepsia and early satiety > Improvement claim > Unknown
An automated migration candidate, not an issued permanent code; exact claim scope remains under review. This machine-generated migration candidate helps retrieval but is not a permanent assignment. The original verdict ID and URL remain authoritative.
What the research actually shows
Twenty-one participants were randomized, 10 to carbonated mineral water and 11 to tap water, and apparently all were analyzed. Both arms were prescribed 1.5 L/day, so this tested carbonation and mineral composition rather than extra water volume. The paper did not perform a direct between-group test. Its funding statement reads, "This study was partially supported by Co.Ge.Di S.p.A. (Terme Uliveto, Pisa, Italy)." Terme Uliveto produced and sold the carbonated mineral water used in the trial, supporting the finding that the trial was funded by an interested party. Actual consumption and urinary measures were not reported.
Why this is classified as C (46)
The randomized trial measured patient symptoms, but it was a single 21-person, 15-day producer-supported study without a recoverable adjusted between-group magnitude or verified intake contrast, giving C with 46 points.
Counterpoint. The within-arm signal justifies confirmation. Statistical change inside one arm is not the same as efficacy versus the randomized control.
Rejudgment record. Cross-check applied — A 21-person, 15-day producer-supported trial reported within-arm changes without a recoverable adjusted between-group treatment magnitude
| Endpoint | P | Symptom or function itself is the target - including patient reports and performance tests |
| Replication | R1 | Single confirmatory trial |
| Independence | I0 | Evidence comes only from manufacturer studies |
| Effect size | EX | The clinical size of the effect could not be judged |
Stored derived and displayed grades match; this is not a current recalculation or validity check (C).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Improved functional-dyspepsia score | C | Within-arm improvement was reported without an adjusted between-group effect. |
| Improved gastric emptying or colonic transit | D | Direct testing did not show improvement. |
| Relief of constipation symptoms | C | The positive signal comes from a small, short trial without independent replication. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Cuomo R et al. 2002 | Double-blind randomized parallel trial | 21 randomized and apparently analyzed, 10 versus 11 | Partially supported by Co.Ge.Di S.p.A. (Terme Uliveto), producer and seller of the tested carbonated mineral water | Dyspepsia score and satiety testing over about 15 days | Dyspepsia scores changed 7.9±2.8 to 5.4±1.7 versus 9.7±5.3 to 9.9±4.0; no adequate adjusted between-group effect or confidence interval was reported. | Exploratory small-trial signal |
Receipt — 2 References
All 2 cited sources were verified for existence at the original page (as of 2026-08-04).
Final verification and publication gate: Codex · Evidence date: 2026-08-04 · Corrections: none
Cite this verdict
[Chamgap] Carbonated mineral water 1.5 L/day x improved functional dyspepsia — Evidence Grade C·46. 2 cited sources checked. Source: https://chamgap.com/en/verdicts/gut/carbonated-mineral-water-functional-dyspepsia/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.