What is anthocyanidin?

Anthocyanidins are flavonoid pigments that give many fruits and vegetables red, blue, and purple colors. They are studied for antioxidant and anti-inflammatory effects.

What foods are high in anthocyanidins?

They are abundant in richly colored plant foods, especially berries and dark red or purple fruits and vegetables. Common sources include blueberries, blackberries, cherries, grapes, and bilberry.

What are the potential health benefits of anthocyanidin?

Research suggests anthocyanidins may support cardiovascular health, help reduce oxidative stress, and modulate inflammation. They are also studied for cognitive and eye health support.

What is a typical anthocyanidin supplement dosage?

Supplement amounts vary by product and extract type, but many formulas fall within about 50–500 mg per day. Follow the label and consider discussing dosing with a clinician if you have medical conditions or take medications.

Is anthocyanidin safe to take daily?

Anthocyanidins from foods are generally considered safe for most people. With supplements, tolerance can vary, and people who are pregnant, breastfeeding, or taking medications should check with a healthcare professional.

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Anthocyanidin

Moderate study situation·7/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Anthocyanidins are flavonoid pigments with antioxidant, anti-inflammatory, and potential cardiovascular and cognitive benefits, commonly found in berries and richly colored fruits.

Eye Health Anti-inflammatory Cardiovascular Support Cognitive Enhancement Antioxidant

dose range

50–500 mg

1 to 2 doses per day, as extract or capsule

Consumption

Take with meals for best absorption.

Not fat-soluble.

Best time

Splitting the dose between morning and midday is common. Most studies use supplements standardized for anthocyanidin content.

Description

Anthocyanidins are natural flavonoid compounds responsible for the red, blue, and purple colors of many fruits and vegetables. They are valued for their antioxidant properties and studied for their roles in supporting cardiovascular, cognitive, and eye health.

benefits

Main effects with level of evidence

Moderate

Note on evidence

There is a moderate level of evidence from observational and interventional studies supporting key benefits of anthocyanidins, mainly in cardiovascular health, antioxidant activity, and cognitive support.

Supports cardiovascular health

Moderate

Anthocyanidin supplementation has been shown to improve vascular function, lower blood pressure, and reduce LDL cholesterol oxidation, supporting heart health in at-risk populations.

Particularly relevant for: Adults with cardiovascular risk factors · Individuals with metabolic syndrome

1 · PubMed – Cardiovascular effects 5 · Examine.com – Anthocyanins (Anthocyanidins)

Potent antioxidant effects

Moderate

Anthocyanidins act as strong antioxidants, neutralizing free radicals and reducing biomarkers of oxidative stress in the body.

Particularly relevant for: General population · People seeking oxidative stress reduction

2 · PubMed – Antioxidant and anti-inflammatory effects 5 · Examine.com – Anthocyanins (Anthocyanidins)7 · Linus Pauling Institute – Flavonoids

May support cognitive health and memory

Limited

Some clinical studies show that anthocyanidin-rich extracts can improve memory and reduce brain oxidative stress in older adults.

Particularly relevant for: Older adults · Individuals at risk for cognitive decline

3 · PubMed – Cognitive health and bilberry 5 · Examine.com – Anthocyanins (Anthocyanidins)

May support eye health

Limited

Anthocyanidins, especially from bilberry, may help maintain visual acuity and protect eye tissue through antioxidant and collagen-stabilizing effects.

Particularly relevant for: Older adults · People concerned with eye health

3 · PubMed – Cognitive health and bilberry 5 · Examine.com – Anthocyanins (Anthocyanidins)

Anti-inflammatory activity

Moderate

Anthocyanidins modulate inflammatory pathways (e.g., NF-κB), contributing to reductions in systemic inflammation.

Particularly relevant for: Individuals with chronic inflammatory conditions

2 · PubMed – Antioxidant and anti-inflammatory effects 7 · Linus Pauling Institute – Flavonoids

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Anthocyanidins are generally well tolerated at typical doses but may cause bleeding or interact with certain medications.

warning notices

Mild gastrointestinal upset, such as diarrhea or nausea, may occur at high doses.
Potential to increase bleeding risk, particularly in people taking blood thinners or with bleeding disorders.
Avoid if you have a bleeding disorder or take anticoagulant medications due to possible effects on platelet aggregation.
Discontinue use before surgery to reduce potential bleeding risk.
Use only with clinical supervision if you are pregnant or breastfeeding.

Known interactions with medications

Antiplatelet agents
Anticoagulants such as warfarin

Contraindications / special precautions

Bleeding disorders
Active surgery or planned surgery within one week

interactions

Important interactions between active ingredient ↔ supplement / medication / food

Anthocyanidins may interact with antiplatelet and anticoagulant drugs, increasing bleeding risk.

May increase bleeding risk when used with warfarin or other anticoagulants.

drug · warfarin

CautionModerate

Why

Anthocyanidins can have mild antiplatelet effects, potentially augmenting the action of anticoagulant drugs.

recommendation

Monitor for bleeding and consult a healthcare provider before combining.

1 · PubMed – Cardiovascular effects 5 · Examine.com – Anthocyanins (Anthocyanidins)6 · EFSA Scientific Opinion – Anthocyanins

May increase risk of bleeding around surgical procedures.

lifestyle · surgery

AvoidModerate

Why

Anthocyanidins could reduce platelet aggregation, increasing surgical bleeding risk.

recommendation

Discontinue anthocyanidin supplements at least one week before surgery, as advised by a clinician.

6 · EFSA Scientific Opinion – Anthocyanins

mechanisms of action

Brief explanations of how it works

Antioxidant activity

Anthocyanidins scavenge free radicals and upregulate endogenous antioxidant defenses, thereby reducing cellular oxidative stress.

2 · PubMed – Antioxidant and anti-inflammatory effects 7 · Linus Pauling Institute – Flavonoids

Modulation of inflammation

Anthocyanidins inhibit pro-inflammatory pathways (e.g., NF-κB), reducing inflammatory cytokine production.

2 · PubMed – Antioxidant and anti-inflammatory effects 7 · Linus Pauling Institute – Flavonoids

Vascular protection

Anthocyanidins improve endothelial cell function and reduce LDL oxidation, supporting vascular health.

1 · PubMed – Cardiovascular effects 5 · Examine.com – Anthocyanins (Anthocyanidins)

Neuroprotection

Anthocyanidins may protect against neurodegeneration by reducing oxidative stress and inflammation in brain tissue.

3 · PubMed – Cognitive health and bilberry 5 · Examine.com – Anthocyanins (Anthocyanidins)

Sources & References

Primary literature and reviews on which these statements are based

7 sources

PubMed – Cardiovascular effects

Systematic review showing cardiovascular benefits.

PubMed – Antioxidant and anti-inflammatory effects

Study on antioxidant mechanisms.

PubMed – Cognitive health and bilberry

Cognitive improvement in elderly.

NIH Office of Dietary Supplements – Flavonoids Fact Sheet

General background and safety.

Examine.com – Anthocyanins (Anthocyanidins)

Comprehensive efficacy and dosage review.

EFSA Scientific Opinion – Anthocyanins

Safety and regulatory assessment for anthocyanin-rich extracts.

Linus Pauling Institute – Flavonoids

Flavonoid mechanisms and sources.

Laatst bijgewerkt: 8 februari 2026

This information is for educational purposes only and does not replace medical advice.