Big effect
Yacon root cut BMI by a large margin in a meta-analysis (SMD –0.81) – but the evidence comes from low-quality trials.
This suggests yacon root may help with weight control, but because the underlying studies had notable limitations and this is one of the first meta-analyses on the topic, the effect should be viewed as promising, not proven.
A meta-analysis pooling 12 clinical trials found that yacon root significantly lowered BMI, with a large effect size of –0.81 standard deviations. Participants also had more frequent bowel movements and increased fiber intake. However, the trials were of limited quality, so these results need confirmation in better-designed studies.
Where this fits in the evidence
This is among the first studies we've indexed on yacon root for Reduced Body Mass Index — treat it as an early signal until more research accumulates.
The study
Yacon root is a functional food beneficial for human health: a meta-analysis of clinical trials.
- Systematic Review
- 2025-12-11
- Frontiers in nutrition
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.