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Yacon

What does the research say about Yacon?

2 health outcomes synthesised

Research on Yacon has examined its potential effects on 2 health outcomes, with the strongest evidence centered on body weight reduction. A synthesis of 3 studies (moderate evidence strength) found that all reported statistically significant beneficial effects on body weight in overweight and obese adults, using doses of 0.1–0.14 g FOS/kg/day. The evidence for waist circumference is weaker and more mixed, with conflicting findings across studies.

Strongest evidence: The most robust area of research is Yacon's effect on body weight reduction, supported by 3 studies with moderate evidence strength. All 3 studies reported statistically significant beneficial effects, with effect sizes ranging from small to large over a median duration of 81 days (approximately 12 weeks). The typical dose was 0.1–0.14 g fructooligosaccharides (FOS) per kg body weight per day, provided as yacon syrup or flour, studied in overweight and obese adults.

Mixed or weaker evidence: For waist circumference, the evidence is low and inconsistent. While 2 of 3 studies reported small beneficial effects using the same FOS dose, a meta-analysis of 246 participants found no significant effect. This discrepancy, along with the small number of studies, makes conclusions about waist circumference preliminary.

Effective dose patterns: Both outcomes converge on a similar dose range of 0.1–0.14 g FOS/kg body weight per day, typically from yacon syrup or flour. The studies lasted 8–12 weeks, suggesting consistent dosing and duration across the research.

Population insights: The research primarily focuses on overweight and obese adults, particularly premenopausal women with dyslipidemia for the waist circumference outcome. No cross-cutting population differences (e.g., elderly or deficient groups) emerged from the available syntheses.

Notable caveats: The evidence base for both outcomes is small (only 3 studies each), so conclusions should be considered preliminary. The overwhelming positive findings for body weight may be influenced by publication bias, as negative results are less likely to be published. For waist circumference, the conflicting meta-analysis adds uncertainty, and the optimal dose and form of Yacon remain unclear despite the consistent dose pattern.

Frequently asked

  • What is Yacon good for according to research?
    Research suggests Yacon may help with body weight reduction, with moderate evidence from 3 studies showing significant effects. For waist circumference, the evidence is weaker and mixed, with 2 of 3 studies showing benefits but a meta-analysis finding no significant effect.
  • What dose of Yacon is typically used in studies?
    Studies typically use 0.1–0.14 g of fructooligosaccharides (FOS) per kg of body weight per day, provided as yacon syrup or flour. This corresponds to approximately 25 g of yacon flour or syrup for a standard adult.
  • Who benefits most from Yacon?
    The research primarily involves overweight and obese adults, with waist circumference benefits noted particularly in premenopausal women with dyslipidemia. The evidence does not indicate other specific populations that benefit more.
  • Are there caveats or limitations in the research on Yacon?
    Yes. The evidence base is small (only 3 studies per outcome), so conclusions are preliminary. Available results are overwhelmingly positive for body weight, but this may reflect publication bias. For waist circumference, a meta-analysis found no significant effect, conflicting with smaller positive studies.
  • Does Yacon help with weight loss?
    Moderate evidence from 3 studies indicates that Yacon significantly reduces body weight in overweight and obese adults, with effects seen after about 12 weeks at doses of 0.1–0.14 g FOS/kg/day. However, the small number of studies limits the strength of this conclusion.
  • Does Yacon help reduce waist circumference?
    The evidence is low and mixed. While 2 of 3 studies reported small beneficial effects, a meta-analysis of 246 participants found no significant effect on waist circumference. This outcome requires further research before firm conclusions can be drawn.

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