Test beverage containing hot-water extract of sun-dried lotus leaves,
does it really help with Reduction of whole-body fat percentage in adults with overweight?
research showsGrade C with 46 points. Of 95 registered participants, 22 discontinuations plus normal-weight and obese completers were excluded, leaving 60 participants with overweight. Reported 12-week between-group reductions in body-fat percentage were -2.6 points in low-dose men (P=.019), -3.7 in low-dose women (P=.009), and -2.9 in high-dose women (P=.027), but no 95% confidence intervals or unified main effect were reported, and industry was involved as sponsor, product source, and author employer.
ads claimDo not claim that lotus-leaf tea causes weight loss, that effects are uniform across sex and dose, that long-term safety is established, or that weight and visceral-fat reduction were proven.
Useful facts when choosing a product
- This verdict applies only to the displayed lotus part, formulation, route, population, claim, endpoint, and comparator.
- Leaf, plumule, whole seed, rhizome, node, tea, extract, food, juice, and combination products are not interchangeable.
- Caution. No test-beverage adverse reactions were reported among the 60 analyzed participants, but this was a small 12-week post-selected sample. Pregnancy, lactation, allergy, liver or kidney disease, and interactions with blood-pressure or glucose medicines remain unverified.
Chamgap Semantic Classification Code
Permanent code issued
S.lotus-leaf-hot-water-extract.oral-beverage.body-fat-percentage.reduce.placeboSupplements and nutraceuticals > Hot-water extract of sun-dried lotus leaves > Test beverage > Whole-body fat percentage > Reduction claim > 0-g extract test beverage
Bound to whole-body fat percentage among completers with overweight after 1-2 g/day in a 400-mL test beverage for 12 weeks; lotus-leaf tea, weight, visceral fat, waist, and the full 95-person randomized cohort are separate. The code identifies the intervention and claim; it never contains the evidence grade, score, or safety result.
Exact Claim Classification
These independent facets prevent evidence from different forms, routes, populations, effects, and comparators from being mixed.
| Intervention class | S · Supplement or nutraceutical |
|---|---|
| Canonical ingredient or intervention | Lotus leaf hot-water extract |
| Source or part used | Sun-dried Nelumbo nucifera leaves extracted with hot water; quercetin-3-O-glucuronide and quercetin were major constituents |
| Formulation or processing | Test beverage 400 mL/day (two 200-mL bottles) containing 0, 1, or 2 g extract |
| Route | Oral beverage |
| Dose | Lotus leaf hot-water extract 1 or 2 g/day |
| Duration | 12 weeks |
| Population | Chinese adults aged 40-60 with overweight; 95 with BMI 23-30 were registered, while the paper analyzed 60 completers with BMI 24-28 |
| Effect or condition | Lower whole-body fat percentage |
| Primary endpoint | Change in whole-body fat percentage at weeks 6 and 12 |
| Comparator | Same-format test beverage containing 0 g extract |
| Duplicate-detection key | Lotus leaf hot-water extract|Test beverage 400 mL/day (two 200-mL bottles) containing 0, 1, or 2 g extract|Oral beverage|Chinese adults aged 40-60 with overweight; 95 with BMI 23-30 were registered, while the paper analyzed 60 completers with BMI 24-28|Lower whole-body fat percentage|12 weeks |
What the research actually shows
The PMID 34852695 report, the 95-person design, retrospective registration and multiple primary outcomes in NCT04651023, and publisher bibliographic metadata were cross-checked.
Why this is classified as C (46)
Axes are S/R1/I0/EX/B2/CX. Post-randomization selection of 60 completers from a 95-person industry trial, sex- and dose-splitting, retrospective registration, multiple primary outcomes, and absent 95% CIs yield C/46.
Counterpoint. The defined hot-water extract and 0-g beverage comparator are direct, but no independent replication was identified and the result cannot be transferred to lotus-leaf tea, capsules, or ordinary food use.
Rejudgment record. Independent Codex cross-check — One exact plant part, formulation, population, claim, endpoint, and comparator
| Endpoint | S | Surrogate marker - laboratory or imaging measures |
| 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 |
| Precision | CX | No pooled confidence interval could be confirmed |
The scoring table and the verdict agree (C).
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Fat reducing effects of Nelumbo nucifera leaf extract in overweight patients | Design and eligibility were independently checked. | 16 | Funding, product supply, employee authorship, and conflicts were assessed separately. | The endpoint was checked against the page claim. | No missing effect estimate or confidence interval was invented. | Eligibility reflects the exact plant part, formulation, population, endpoint, and comparator. |
Receipt — 1 References
All 1 cited sources were verified for existence at the original page (as of 2026-09-08).
Final verification and publication gate: Codex · Verification cutoff: 2026-09-08 · Corrections: none
Cite this verdict
[Chamgap] Sun-Dried Lotus Leaf Hot-Water Extract for Body-Fat Percentage—A Positive 60-Completer Analysis After Post-Randomization Selection From 95 Participants — Evidence Grade C·46. 1 cited sources checked. Source: https://chamgap.com/en/verdicts/weight/lotus-leaf-hot-water-extract-whole-body-fat-percentage/ · 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.