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Anthocyanins

What does the research say about Anthocyanins?

3 health outcomes synthesised

Anthocyanins, a class of flavonoid pigments found in berries and other plants, have been researched for 3 health outcomes, with the strongest evidence supporting a modest reduction in hemoglobin A1c (HbA1c) based on 3 studies. The most-studied dose is 320 mg/day, and research populations often include both healthy individuals and those with cardiometabolic conditions.

Strongest evidence: The most robust finding for anthocyanins is a moderate reduction in hemoglobin A1c, supported by 3 studies and rated as moderate evidence strength. A meta-analysis of 32 RCTs (1491 participants) found a statistically significant moderate effect (SMD: -0.65), with doses up to 320 mg/day associated with reductions of ~0.3–0.5% HbA1c. This evidence primarily comes from mixed populations including both healthy adults and those with cardiometabolic diseases.

Mixed or weaker evidence: For LDL cholesterol, 3 studies all reported beneficial effects (rated low evidence strength), with a meta-analysis showing a moderate effect (SMD: -0.35). However, the evidence base is small and heterogeneity is high (I² = 85.2%). For total blood cholesterol, the evidence is also low: 2 of 3 studies found benefits, but one recent RCT (2026) found no significant effect, and heterogeneity is high (I² = 86.9%).

Effective dose patterns: Across all three outcomes, the most common effective dose is 320 mg/day. Studies for LDL and total cholesterol had a median duration of 168 days (24 weeks), suggesting effects may require several months of supplementation to manifest.

Population insights: Research populations are mixed, frequently including both healthy individuals and those with cardiometabolic disorders. For LDL and total cholesterol outcomes, some studies specifically focused on older adults (aged 60–80 years) with mild cognitive impairment or cardiometabolic disorders.

Notable caveats: All three syntheses are based on only 3 studies each, making conclusions preliminary. Publication bias is likely — null results may not be indexed. High heterogeneity (I² > 85%) across meta-analyses indicates substantial variability between trials, and the most recent RCT for total blood cholesterol (2026) found no effect, tempering earlier positive findings.

Frequently asked

  • What is Anthocyanins good for according to research?
    Research suggests anthocyanins may help reduce hemoglobin A1c (moderate evidence, 3 studies) and modestly lower LDL cholesterol and total blood cholesterol (low evidence, 3 studies each). All findings come from small evidence bases and should be considered preliminary.
  • What dose of Anthocyanins is typically used in studies?
    The most-studied dose across multiple outcomes is 320 mg per day. For hemoglobin A1c, doses up to 320 mg/day were associated with reductions of ~0.3-0.5% HbA1c, and the same dose was used in studies on LDL and total cholesterol in older adults.
  • Who benefits most from Anthocyanins?
    Research populations are mixed, including both healthy individuals and those with cardiometabolic diseases. For LDL and total cholesterol outcomes, some studies focused on older adults (aged 60–80 years) with mild cognitive impairment or cardiometabolic disorders.
  • Are there caveats or limitations in the research on Anthocyanins?
    Yes. Each outcome is based on only 3 studies, so conclusions are preliminary. Publication bias is likely, as null results may not be published. High heterogeneity (I² > 85%) in meta-analyses indicates inconsistent effects across trials, and one recent RCT (2026) for total blood cholesterol found no significant effect.
  • Does Anthocyanins help reduce LDL cholesterol?
    Three studies reported beneficial effects on LDL cholesterol (low evidence strength). A meta-analysis of 32 RCTs found a moderate effect (SMD: -0.35), but the evidence base is small and heterogeneity is high (I² = 85.2%), meaning results vary across trials.
  • Does Anthocyanins help with blood sugar control?
    Yes, the strongest evidence is for reducing hemoglobin A1c (moderate evidence, 3 studies). A meta-analysis of 32 RCTs showed a moderate reduction (SMD: -0.65), with doses up to 320 mg/day associated with ~0.3-0.5% improvements in mixed populations.

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