Yacon syrup,
does it really help with Post-meal satiety and appetite suppression?
research showsThe grade is D with 30 points. In a prospectively registered randomized double-blind crossover trial, the primary endpoints, GLP-1 and ghrelin areas under the curve, were both null. Secondary hunger, satiety, fullness, and desire-to-eat ratings were also null. No 95% confidence intervals were reported, so the range of possible benefit remains unknown.
ads claimContaining a prebiotic carbohydrate is a composition fact, not proof of appetite suppression. The trial directly measured both appetite hormones and subjective appetite and found no difference.
Useful facts when choosing a product
- The 40-g yacon-syrup dose contained 14 g of fructooligosaccharides.
- Yacon is native to the Andes, and no record was confirmed in the surveyed Korean, Chinese, Japanese, Indian, Islamic, or Greco-Roman classical sources.
- Verdict 021 is D with no recorded score for bitter melon, Jerusalem artichoke, and glucose. Yacon is a different plant, and this verdict addresses appetite.
What the research actually shows
The flow diagram shows 42 women starting and 40 completing and entering analysis, while the paper does not clearly distinguish randomized from started counts. Breakfast plus 40 g yacon syrup was compared with maltodextrin in a randomized double-blind crossover design. Ghrelin and GLP-1 areas under the curve and ratings of hunger, satiety, fullness, and desire to eat were all nonsignificant. Main 95% confidence intervals were not reported. Support came from FUNECE and the State University of Ceara, the Brazilian public agricultural institute Embrapa Agroindustria Tropical, and CAPES-related sources; this is not identified as manufacturer funding.
Why this is classified as D (30)
The prospectively registered primary GLP-1 and ghrelin areas under the curve and the secondary subjective appetite outcomes were all null in the direct randomized trial. Because it was a single small acute study with no confidence intervals, it does not exclude meaningful benefit and receives D with 30 points.
Counterpoint. The study addressed acute post-meal responses, not long-term food intake or weight change.
Rejudgment record. Cross-check applied — Prospectively registered primary GLP-1 and ghrelin areas under the curve and secondary subjective appetite outcomes were all null in a small acute crossover trial with no reported 95% confidence intervals
| Endpoint | P | Patient-reported treatment goal - the symptom is the goal |
| Replication | R1 | Single confirmatory trial |
| Independence | I2 | Decisive evidence is publicly or non-profit funded |
| Effect size | E0 | Null |
| Precision | CX | No pooled confidence interval could be confirmed |
The scoring table and the verdict agree (D).
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 |
|---|---|---|
| Acute appetite suppression by yacon syrup | D | Primary GLP-1 and ghrelin and secondary subjective appetite outcomes were all nonsignificant. |
Cross-check — Codex and Claude
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Study 1 | Double-blind randomized crossover single-meal trial | 40 | Brazilian university, public agricultural institute, and CAPES-related support | Primary GLP-1 and ghrelin AUCs; secondary subjective appetite | Primary hormone and secondary subjective appetite outcomes all null; no 95% CIs reported | Direct prospectively registered randomized null result |
Receipt — 2 References
All 2 cited sources were verified for existence at the original page (as of 2026-08-02).
Reviewed and approved: Chamgap Editorial Team · Approval date: 2026-08-02 · Corrections: none
Cite this verdict
[Chamgap] Yacon syrup x post-meal satiety and appetite suppression — Evidence Grade D·30. 2 cited sources checked. Source: https://chamgap.com/en/verdicts/weight/yacon-syrup-postprandial-satiety-appetite-suppression/ · 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.