Carbohydrate mouth rinse,
does it really help with A small improvement in mean power output during cycling?
research showsC. The Brietzke meta-analysis found a small positive mean-power effect across 13 studies and 16 trials (n=175): SMD 0.25 (95% CI 0.04 to 0.46), I²=0%, with the confidence interval excluding zero. Completion time was null across 14 trials (n=151): SMD −0.13 (95% CI −0.36 to 0.10), I²=0%, P=.25. Thus, heterogeneity was absent but results diverged by endpoint: mean power was significantly positive, while faster completion was not demonstrated. The small, single-session crossover trials do not support B, but the positive pooled mean-power estimate supports C with 52 points. The correction in Sports Med. 2019;49(4):645 changed the Figure 2 axis label without changing the effect size or conclusion.
ads claimMarketing can imply that merely rinsing the mouth will make race times faster. The evidence supports only a small mean-power signal, not a demonstrated reduction in completion time.
Useful facts when choosing a product
- Most studies used a solution containing at least 6% maltodextrin, glucose, or sucrose, rinsed for five to ten seconds and then expectorated rather than swallowed.
- The mean-power result came from 175 participants across 13 studies and 16 randomized crossover trials, while the completion-time result came from 151 participants in 14 trials.
- Repeated tooth exposure to carbohydrate solutions can support bacterial acid production and dental caries, so rinsing with water afterward and maintaining fluoride-toothpaste hygiene are reasonable precautions.
- A mouth rinse does not replace carbohydrate or fluid intake during exercise, and longer events require a separate nutrition and hydration strategy.
Chamgap Semantic Classification Code
Candidate index · review held
X.carbohydrate-mouth-rinse.oromucosal.a-small-improvement-in-mean-power-output-during-cycling.improve.placeboBehaviors, exposures and policies > Carbohydrate mouth rinse > Oromucosal > A small improvement in mean power output during cycling > Improvement claim > Placebo
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
The Brietzke meta-analysis found a small positive mean-power effect across 13 studies and 16 trials (n=175): SMD 0.25 (95% CI 0.04 to 0.46), I²=0%, with the confidence interval excluding zero. Completion time was null across 14 trials (n=151): SMD −0.13 (95% CI −0.36 to 0.10), I²=0%, P=.25. Thus, heterogeneity was absent but results diverged by endpoint: mean power was significantly positive, while faster completion was not demonstrated. The small, single-session crossover trials do not support B, but the positive pooled mean-power estimate supports C with 52 points. The correction in Sports Med. 2019;49(4):645 changed the Figure 2 axis label without changing the effect size or conclusion.
Why this is classified as C (52)
The Brietzke meta-analysis found a small positive mean-power effect across 13 studies and 16 trials (n=175): SMD 0.25 (95% CI 0.04 to 0.46), I²=0%, with the confidence interval excluding zero. Completion time was null across 14 trials (n=151): SMD −0.13 (95% CI −0.36 to 0.10), I²=0%, P=.25. Thus, heterogeneity was absent but results diverged by endpoint: mean power was significantly positive, while faster completion was not demonstrated. The small, single-session crossover trials do not support B, but the positive pooled mean-power estimate supports C with 52 points. The correction in Sports Med. 2019;49(4):645 changed the Figure 2 axis label without changing the effect size or conclusion.
Counterpoint. A small power difference may matter in a short high-intensity cycling session, but individual response and feeding state may vary and a faster finish is not guaranteed.
Rejudgment record. Cross-check applied — The Brietzke meta-analysis found a small positive mean-power effect across 13 studies and 16 trials (n=175): SMD 0.25 (95% CI 0.04 to 0.46), I²=0%, with the confidence interval excluding zero. Completion time was null across 14 trials (n=151): SMD −0.13 (95% CI −0.36 to 0.10), I²=0%, P=.25. Thus, heterogeneity was absent but results diverged by endpoint: mean power was significantly positive, while faster completion was not demonstrated. The small, single-session crossover trials do not support B, but the positive pooled mean-power estimate supports C with 52 points. The correction in Sports Med. 2019;49(4):645 changed the Figure 2 axis label without changing the effect size or conclusion.
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 mean cycling power output | C | The pooled mean-power estimate across 13 studies and 16 trials (n=175) was small but significantly positive. |
| Reduced cycling time to completion | D | The pooled result across 14 trials and 151 participants was not significant. |
| Improved real-world race performance or long-term training effects | ? | No human confirmatory trial addresses this endpoint beyond single-session laboratory or simulated tests. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Brietzke C et al. 2019 | Peer-reviewed systematic review and random-effects meta-analysis | 13 studies; mean power: 16 trials, n=175; completion time: 14 trials, n=151 | Public academic funding from FAPESP and CAPES; no relevant conflicts reported | Mean power output and time to complete the trial | Mean power was positive: SMD 0.25 (95% CI 0.04 to 0.46), I²=0%; completion time was null: SMD −0.13 (95% CI −0.36 to 0.10), I²=0%, P=.25. | Key synthesis; limited by small, short trials and divergent endpoints |
| Murray KO et al. 2018 | Peer-reviewed randomized double-blind placebo-controlled crossover trial | 8 trained cyclists | Academic research; not a manufacturer confirmatory trial | Forty-kilometer cycling time-trial performance and mean power | This individual trial in 8 trained cyclists was positive, but the extremely small sample did not resolve the limitations of the pooled evidence. | Supporting direct evidence |
Receipt — 3 References
All 3 cited sources were verified for existence at the original page (as of 2026-07-24).
Final verification and publication gate: Codex · Evidence date: 2026-07-24 · Corrections: none
Cite this verdict
[Chamgap] Carbohydrate mouth rinse x a small improvement in cycling mean power output — Evidence Grade C·52. 3 cited sources checked. Source: https://chamgap.com/en/verdicts/sports/carbohydrate-mouth-rinse-cycling-mean-power/ · 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.