Herbal Extract
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Bilberry extract is rich in anthocyanins that support retinal microcirculation and may reduce eye fatigue from screen use. Clinical evidence is moderate for eye fatigue and retinal health. Typical doses are 160-480 mg standardized extract (25-36% anthocyanins) daily.
Bilberry has a moderate evidence base for eye health. A 2012 systematic review identified 30 clinical trials, noting that while earlier studies were methodologically weak, newer RCTs show benefits for eye fatigue and retinal microcirculation. The anthocyanin content is the primary active component, and standardized extracts (25-36% anthocyanins) are recommended for consistent effects.
Bilberry has a moderate evidence base for eye health.
| Form | Bioavailability | Best For |
|---|---|---|
| Standardized Bilberry Extract (25% anthocyanins) | Moderate | General eye health — the most common and well-studied form |
| Bilberry Extract (36% anthocyanins) | Moderate-High | Higher potency — concentrated anthocyanin content |
| Whole Bilberry Powder | Low-Moderate | Whole-food approach — lower anthocyanin concentration but includes fiber |
General recommendation: 160-480 mg standardized extract daily (25-36% anthocyanins)
Timing: Can be taken any time of day; split dosing (twice daily) may be preferable • Take with food for best absorption.
| Condition | Recommended Dose | Evidence |
|---|---|---|
| Eye fatigue / screen strain | 480 mg standardized extract daily | Moderate |
| General eye health | 160-320 mg daily | Moderate |
| Retinal support | 320-480 mg daily | Emerging |
Upper limit: 600 mg/day of standardized extract; higher doses not well studied
Safety profile: Generally Safe
The WWII British pilot story is likely wartime propaganda. However, some controlled studies do show modest improvements in dark adaptation speed with bilberry supplementation. The effect is more pronounced in people with impaired night vision than in healthy individuals with normal vision.
Yes. A 2015 randomized controlled trial in Japanese VDT (screen) workers found that 480 mg of bilberry extract daily significantly reduced subjective eye fatigue and improved accommodative function after 8 weeks compared to placebo.
They serve different roles. Lutein has stronger evidence for AMD prevention and macular protection (AREDS2 trial). Bilberry is better studied for eye fatigue and retinal microcirculation. Many eye health supplements combine both for comprehensive support.