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Bilberry

Bilberry

Best for

Reduce screen eye strain

Faint early signal 240–480 mg/day 8–12 weeks 2 studies, n=177 #1 of 3 studied

  • 11 papers
  • 1 of 34 outcomes
  • 1 positive

Bilberry shows a faint early signal for easing close-work eye strain, while evidence across other vision outcomes remains too limited for stronger promises.

Median effective dose, most-studied outcomes

  • Ease screen-related eye strain 240 mg 8–12 wk
Full protocol, 2 outcomes

Risk, worst reported severity

  • headache mild
  • malaise mild
  • doxorubicin moderate
  • antineoplastic agents moderate
All 11 events and interactions

What bilberry actually does

Outcome Effect Evidence Dose Time Rank
Early research 1
Reduce screen eye strain Faint early signal Screen use can leave eyes feeling tired, dry, sore, or blurred by the end of the day.
small 		2 RCTs 2 papers · n=177 240–480 mg 8–12 wk #1 /3

Effect tiers come from native-unit MCID where available, Cohen's d otherwise.

Protocol

Dose, timing & forms

How much

For screen-related eye strain, studies tested 240 to 480 mg daily of bilberry extract for about 8 to 12 weeks. The signal was small and comes from only two studies, so treat this as a cautious trial for comfort, not a dependable vision upgrade.1

When and how long

Use bilberry daily and give it weeks, rather than taking it only before a heavy screen day. The eye-fatigue research followed regular supplementation for 8 to 12 weeks, but it does not establish a clearly superior morning, evening, or meal-time schedule.1

Forms & standardisation

Look for a product that clearly identifies bilberry as Vaccinium myrtillus and lists its anthocyanin content, rather than relying on vague “berry complex” wording. Anthocyanins are the pigment compounds most often used to explain bilberry’s antioxidant and blood-vessel effects, but current eye-strain evidence does not prove that a higher label percentage produces better results.12

Studied range, by outcome

Outcome Studied range Median effective Duration Evidence
Ease screen-related eye strain 240–480 mg 240 mg 8–12 wk 2 papers 5 sig. endpoints
Support overall antioxidant capacity 470 mg — — 1 paper

Adverse events and drug interactions

Safety events

headache mild
malaise mild
gastritis mild
gastric distress mild
tinnitus mild
throat pain mild
nausea mild
Common cold

Drug interactions

doxorubicin moderate unknown
antineoplastic agents moderate increases effect
antithrombotic agents moderate increases toxicity
Buy well

Recommended Bilberry products

Real products that dose Bilberry where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Bilberry dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

In context

What this is and how it works

  • Across 2 studies (n=177), bilberry improved close-work eye-strain measures; effect size and MCID were not reported.1
  • The review covered 11 papers spanning 34 outcomes, with strongest evidence focused on close-work visual strain.
  • Findings do not support grand promises about sharper vision or improved night vision.

Bilberry is a small, dark blue European berry, usually sold as a fruit extract rather than as a fresh food. Its ink-like color comes from anthocyanins, plant pigments that also give berries and purple vegetables their deep shades.2

Bilberry anthocyanins act like a rust-control crew around delicate tissues, helping limit the chain reactions that oxidative stress can start.2 They also influence blood-vessel signaling, which researchers think could matter for eye comfort during sustained close work, though that link still needs stronger human trials.12

Bottom line

Bilberry is most reasonable for someone curious about a low-key, several-week experiment for screen-related eye comfort who understands the expected effect is small. Skip the grand promises about sharper vision or night vision, because the evidence does not support them. Check with a clinician first if you use blood-thinning or cancer medicines.

Frequently asked

Common questions

Does bilberry actually help screen eye strain?

Early trials show a small signal that daily bilberry supplementation can improve comfort during close visual work, but the evidence remains too limited to call it a reliable fix for screen fatigue.1

How long does bilberry take to work for eye fatigue?

The eye-strain trials ran for roughly 8 to 12 weeks, so bilberry is not an occasional, before-a-long-day-on-the-laptop supplement.1

Is bilberry the same as blueberry?

They are close relatives, but bilberry supplements usually use Vaccinium myrtillus fruit extract. Bilberries generally contain more deeply colored anthocyanin pigments than common cultivated blueberries.2

Who should avoid bilberry supplements?

Talk with a clinician before using bilberry if you take blood-thinning medication or cancer medicines. Reported side effects include mild headache and stomach upset.

Sources

Sources

  1. 1. Bilberry and visual function: a systematic review
  2. 2. Anthocyanins from bilberry and their effects on oxidative stress and vascular function

Generated August 27, 2026

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