Best Supplements for Improved Insulin Levels
Ranked by research evidence. Compare 73 supplements across 86 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Moderate evidence3 studies
Across 3 studies, all reported beneficial effects on insulin levels, with a predominant moderate effect size. The most studied dose was 1000 IU/day, and effects were observed in clinical populations including gestational diabetes, type 2 diabetes, and metabolic-associated fatty liver disease. Study durations ranged up to 12 weeks, with a median of 42 days.
Product matchViva Naturals — Vitamin D3 with Organic Liquid Coconut Oil125 mcg · $15.16 · ★5.0 (208) - Moderate evidence3 studies
Across 3 studies, all reported beneficial effects on insulin levels, with effect sizes ranging from moderate to large. The evidence is drawn from clinical populations with non-alcoholic fatty liver disease (NAFLD) or metabolic syndrome, using grape seed extract at doses of 100–520 mg/day over a median of 58 days. All three studies reached statistical significance.
Dose: 100–520 mg/day (grape seed extract) - Low evidence3 studies
Across 3 studies, 1 reported a beneficial small effect of black cumin on insulin levels, while 2 meta-analyses found neutral effects. The predominant effect size across all studies was small. The median study duration was 56 days, and the only study reporting a dose used 2000 mg/day in overweight/obese women.
- ModerateVitamin DAcross 3 studies, all reported beneficial effects on insulin levels, with a predominant moderate effect size. The most studied dose was 1000 IU/day, and effects were observed in clinical populations including gestational diabetes, type 2 diabetes, and metabolic-associated fatty liver disease. Study durations ranged up to 12 weeks, with a median of 42 days.3 beneficial3 studies
- ModerateRed GrapeAcross 3 studies, all reported beneficial effects on insulin levels, with effect sizes ranging from moderate to large. The evidence is drawn from clinical populations with non-alcoholic fatty liver disease (NAFLD) or metabolic syndrome, using grape seed extract at doses of 100–520 mg/day over a median of 58 days. All three studies reached statistical significance. · Dose: 100–520 mg/day (grape seed extract)3 beneficial3 studies
- LowBlack CuminAcross 3 studies, 1 reported a beneficial small effect of black cumin on insulin levels, while 2 meta-analyses found neutral effects. The predominant effect size across all studies was small. The median study duration was 56 days, and the only study reporting a dose used 2000 mg/day in overweight/obese women.1 beneficial2 neutral3 studies