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 showsThe legacy C·46 rating is under review. The retained record lists 95 randomized participants, 22 discontinuations, and 60 overweight completers analyzed. Reasons for excluding the other 13 are unverified in this record; they are not all counted as discontinuations. Reported 12-week body-fat changes were -2.6 percentage points in men receiving 1 g/day (P=.019), -3.7 in women receiving 1 g/day (P=.009), and -2.9 in women receiving 2 g/day (P=.027). Whether each is a between-group contrast or a within-group change remains unverified; 95% CIs and a unified main effect were not available. Industry was involved in sponsorship, product supply, and author employment.
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 |
Stored derived and displayed grades match; this is not a current recalculation or validity check (C).
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Fat reducing effects of Nelumbo nucifera leaf extract in overweight patients | Three-arm randomized trial, blinded to participants and care providers, with a 0 g control drink; registered 11 years after completion. | 95 randomized; discontinuations 7/6/9; only 22/22/16 overweight completers analyzed. | Sponsored by Shanghai Meiji Health Science and Technology; several authors employed in Meiji R&D; study drinks supplied. | Whole-body fat percentage at 12 weeks. | Reported subgroup changes: men, 1 g/day, -2.6 percentage points (P=.019); women, 1 g/day, -3.7 (P=.009); women, 2 g/day, -2.9 (P=.027). No 95% CI reported; the contrast underlying these changes is unverified in the retained record. | Direct formulation and control drink, but post hoc selection, industry involvement, and multiple analyses limit interpretation. |
Receipt — 1 References
Retained evidence-access date: 2026-09-08. This correction checked record consistency; it did not reverify every original source or recertify the grade.
This correction by: Codex · Evidence date: 2026-09-08 · Corrections: 1
Correction log — 1
Corrections applied to this verdict, in chronological order. Changes are logged, not erased.
- 2026-09-14 · Editorial correction and legacy-grade review notice — Replaced six English evidence placeholders and citation descriptions with retained facts, and disclosed denominator and contrast uncertainties. Grade and score are retained, not certified as a new final assessment. (grade C unchanged)
Cite the review status too
Legacy grade under review. New grade-card distribution is on hold.
[Chamgap] Sun-Dried Lotus Leaf Hot-Water Extract for Body-Fat Percentage—A Positive 60-Completer Analysis After Post-Randomization Selection From 95 Participants — legacy C · 46, under review. https://chamgap.com/en/verdicts/weight/lotus-leaf-hot-water-extract-whole-body-fat-percentage/ · CC BY 4.0What 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.