Research synthesisHigh evidenceMixed effect size5 studies · 5 beneficial · 0 neutral · 0 harmful
Across all 5 studies in the database, turmeric (curcumin) supplementation consistently reduced fasting blood glucose, with 5 of 5 studies reporting statistically significant beneficial effects. The predominant effect size was mixed (small to large), with meta-analyses reporting reductions ranging from -6.30 to -19.64 mg/dL. Studies primarily targeted clinical populations with type 2 diabetes or metabolic syndrome, and effects were observed across various curcumin formulations, though most trials did not provide specific dose or duration details.
- Studied populations: adults with type 2 diabetes, postmenopausal women, adults with metabolic syndrome or related disorders (non-alcoholic fatty liver disease, obesity, polycystic ovary syndrome)
Caveats: Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). Dose and form data were not extracted from studies, making it difficult to identify an optimal or consistent dosing regimen. Most studies were systematic reviews or meta-analyses, and individual trial durations were not consistently reported, limiting conclusions about time to effect.
Generated Jun 13, 2026