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evidence · mechanism · dose
Supplements/Herb

Bilberry

aka Vaccinium myrtillus

Anthocyanin-rich berry traditionally used for night vision and vascular support.

Eye HealthCardiovascular Health

Overview

Anthocyanin-rich berry traditionally used for night vision and vascular support.

Natural sources
  • Vaccinium myrtillus
Common forms
  • Standardized anthocyanins 25%

Mechanism of action

Anthocyanins regenerate rhodopsin and strengthen capillary integrity.

Pathways
  • · Anthocyanin antioxidant

Effects on the body

Supports
Vascular integrity

Organ system effects

Eye

Mild improvement in night vision claimed; data limited.

Evidence-based benefits

Improves capillary fragility

Moderate evidence

Night vision claims weakly supported

Limited evidence

Potential side effects

Common
    Rare
      Serious

        Drug interactions

        Anticoagulants
        Mild antiplatelet.
        minor

        Safety & non-supplemental interactions

        Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

        Avoid if you are
        • ·Pregnant or breastfeeding (insufficient safety data)
        • ·Children under 18 (unless directed by a clinician)
        Avoid with these conditions
        • ·Bleeding disorders
        Avoid / monitor with these medications
        • ·Warfarin, DOACs, antiplatelets, NSAIDs (additive bleeding risk)
        Before surgery
        • ·Discuss stopping ≥2 weeks before scheduled surgery.

        Supplement interactions

        Pairs well with

        None listed.

        Avoid combining with

        No specific avoidances listed.

        Dosing & bioavailability

        Typical dose
        120–240 mg standardized

        Where to buy

        Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

        Herb
        Bilberry
        Amazon
        Wide selection · fast shipping
        Herb
        Bilberry
        iHerb
        Global delivery · curated brands
        Herb
        Bilberry
        Thorne
        Practitioner-grade · NSF tested

        Scientific evidence (9)

        RCTNutrients · 2020

        Bilberry anthocyanins and vision/eye fatigue

        Kosehira M, et al.

        8-week RCT of bilberry extract in VDT users.

        Key findings

        Reduced eye-fatigue scores vs placebo.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Bilberry — Improves capillary fragility

        Live PubMed search

        Live results for "Bilberry Improves capillary fragility" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Bilberry and "Improves capillary fragility". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Bilberry — Night vision claims weakly supported

        Live PubMed search

        Live results for "Bilberry Night vision claims weakly supported" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Bilberry and "Night vision claims weakly supported". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Bilberry — randomized controlled trial

        Live PubMed search

        Live results for "Bilberry randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Bilberry and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Bilberry — meta-analysis

        Live PubMed search

        Live results for "Bilberry meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Bilberry and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Bilberry — pharmacokinetics

        Live PubMed search

        Live results for "Bilberry pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Bilberry and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Bilberry — safety adverse events

        Live PubMed search

        Live results for "Bilberry safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Bilberry and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Bilberry — dose response

        Live PubMed search

        Live results for "Bilberry dose response" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Bilberry and "dose response". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewGoogle Scholar · 1970

        Google Scholar: Bilberry — clinical evidence

        Live Scholar search

        Cross-database citation index for Bilberry as it relates to "clinical evidence".

        Key findings

        Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

        Open study
        Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.