Research synthesisModerate evidenceMixed effect size3 studies · 2 beneficial · 1 neutral · 0 harmful
Across 3 studies, 2 reported beneficial effects (one large, one moderate) on reducing postprandial glucose, while 1 found a neutral small effect. The predominant effect size is mixed (moderate to large). The most-studied dose range is 4–55 g premeal, with most studies using 15–30 g. Beneficial effects were observed in general adults and in pregnant women with gestational diabetes, but study durations were short (median 7 days).
- Effective dose range: 4–55 g premeal (most studies used 15–30 g)
- Studied populations: general adults, pregnant women with gestational diabetes, overweight women with impaired fasting glucose
Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Study durations were short (median 7 days), so long-term effects are unknown. The neutral study was conducted in a specific population (overweight women with high intra-pancreatic fat) and may not generalize to broader groups. No form (e.g., concentrate vs. isolate) data were reported, limiting specificity.
Generated Jul 11, 2026