Myth-buster
A meta-analysis of 7 trials found yacon had no statistically significant effect on fasting blood sugar (p=0.33) — though hints of benefit appeared only in people over 40 or after 8 weeks of use.
This is among the first systematic reviews on yacon for blood sugar, and the overall null result means the popular idea that yacon reliably lowers glucose is not supported by current evidence — any potential effect remains uncertain and limited to specific subgroups.
Researchers pooled 7 randomized trials with 239 adults and found that yacon consumption did not significantly reduce fasting blood sugar, insulin, cholesterol, or triglycerides. The only signals of possible benefit emerged in subgroup analyses of people over 40 or studies lasting longer than 8 weeks, but these are exploratory findings that need confirmation — the main result is clear: no overall effect.
Where this fits in the evidence
This is among the first studies we've indexed on Yacon for Reduced Fasting Blood Glucose Levels — treat it as an early signal until more research accumulates.
The study
- Meta-Analysis
- n = 239
- 2025-10-28
- Endocrinology, diabetes & metabolism
- PubMed: 41152200
- DOI: 10.1002/edm2.70121
- Full study breakdown →
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.