Is a higher dose always better?

No. Dose-fit rewards landing inside the range studied for the outcome — over-dosing (common with melatonin) or under-dosing both lower the score. The goal is the effective dose, not the biggest number.

What does the Value score mean?

The Value score compares a product's price per serving with clinically relevant products ranked for the same outcome. A score of 50 is the typical price; above 50 means better value than typical, while below 50 means the product costs more than typical. It is a 0–100 value signal, not a percentile.

Why is the cheapest product not #1?

Cost is only one input. The cheapest pick here is a citrate form with weaker absorption and a stock-risk flag, so it leads on Value-for-cost but trails on the composite that also weighs evidence, dose fit and availability.

Are these affiliate links?

Retailer links may be affiliate links and DoseRank may earn a commission. Rankings and placement are determined by the scoring model only — never by payment from a brand.

Is this medical advice?

No. DoseRank summarizes evidence to help you choose; it is not a substitute for a clinician, especially if you are pregnant, breastfeeding, on medication, or managing a health condition.

Reduce eye strain

What this outcome means

Eye strain is the tired, aching, or dry feeling that builds after long stretches of focused looking. On DoseRank it maps to a defined health outcome built from human studies on visual fatigue scores, blink rate, and time-to-discomfort during sustained focus – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Screen-heavy daysHours at a monitor or phone with few breaks.

Close-up focus workReading, sewing, or detail tasks that tax the eyes.

Dry, tired eyesGritty, aching eyes by the end of the day.

Stack buildersAlready taking supplements such as Bilberry Anthocyanins and want the dose right.

Evidence level

78Moderate-strong

Bilberry Anthocyanins – has moderate public evidence for this outcome. This usually means there are smaller or mechanistic studies, but not randomized human trials. A DoseFit Score of 92 means this product's ingredient forms and doses are close to what was used in the studies behind this ranking - DoseRank weights each product ingredient.

Best available ingredients

Bilberry Anthocyanins is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 92

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Above range: Bilberry Anthocyanins 300 mg vs 40-160 mg.

Processed

992

Available

992

Ingredients

Brands

153

Coverage

100%

How to read the scores

What every metric means

Each score is 0–100. Higher is better for every metric below.

CompositeThe overall DoseRank score — a weighted blend of clinical strength, evidence, dose fit, trust and value.Higher is better

ClinicalHow strongly the formula's ingredients and doses match what clinical studies used for this outcome.Higher is better

EvidenceHow much published human research backs the formula's key ingredients for this outcome — both how many studies exist and how strong they are.Higher is better

ValueHow the price per serving compares with similar products for this outcome — 50 is the typical price, higher means better value for your money.Higher is better

TrustHow well customers rate this product, with extra weight given to ratings backed by a large number of reviews.Higher is better

PopularityHow strongly this product sells compared with the other ranked products for this outcome.Higher is better

This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →

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Get a personal report

A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.

Questions

Frequently asked

Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.

Reduce eye strain

What this outcome means

Who it's for

Screen-heavy daysHours at a monitor or phone with few breaks.

Close-up focus workReading, sewing, or detail tasks that tax the eyes.

Dry, tired eyesGritty, aching eyes by the end of the day.

Stack buildersAlready taking supplements such as Bilberry Anthocyanins and want the dose right.

Evidence level

78Moderate-strong

Best available ingredients

Bilberry Anthocyanins is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 92

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Above range: Bilberry Anthocyanins 300 mg vs 40-160 mg.

Processed

992

Available

992

Ingredients

Brands

153

Coverage

100%

Relevant ingredients

Which ingredient types matter for eye strainOpen to see which ingredient types matter for eye strain

835 products across 2 ingredient types — open to filter the ranking.

Use types to filter ranked products

Antioxidants & Bioactive Compounds

830 products

Molecules that neutralize free radicals and tune cell signaling. Helpful in balance; mega-doses can blunt the body's own adaptive defenses.

Typical: , , , ...

Botanicals/Herbal Extracts

5 products

Concentrated plant and herbal extracts standardized to actives. Potency depends on the extract ratio and marker content, not raw weight.

Typical:

Top decision cards

Best products for eye strain

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for eye strain

Nutricost, Bilberry, 90 Capsules (300 mg per Capsule)

Nutricost$0.10 / serving4.7 · 1,081Available now

Also helps with

Antioxidant capacity

Oxidative stress biomarkers

Microcirculation

Why this ranks here

Evidence fitBilberry Anthocyanins has moderate human evidence for this outcome.
Dose fitBilberry Anthocyanins at 300 mg is higher than the studied 40-160 mg window.
Price / serving$0.10 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustSolid trust signals from buyer ratings, with room to grow.

The numbers

300 mgAbove rangehigher than the studied 40-160 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

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California Gold Nutrition, Astaxanthin, Astalif® Pure Icelandic, 12 mg, 120 Veggie Softgels

California Gold NutritionClinical89Dose fit90Popularity99$0.35/ serving

NOW Foods, Astaxanthin, 10 mg, 60 Softgels

NOW FoodsClinical89Dose fit84Popularity99$0.39/ serving

NOW Foods, Astaxanthin, 4 mg, 60 Veggie Softgels

NOW FoodsClinical87Dose fit67Popularity99$0.19/ serving

Nutricost, Astaxanthin, 6 mg, 120 Softgels

NutricostClinical88Dose fit72Popularity91$0.17/ serving

Sports Research, Astaxanthin, Mini-Gels, 6 mg, 120 Softgels

Sports ResearchClinical88Dose fit72Popularity91$0.21/ serving

Sports Research, Astaxanthin, Triple Strength, 12 mg, 60 Softgels

Sports ResearchClinical89Dose fit90Popularity96$0.42/ serving

Doctor's Best, Astaxanthin, 6 mg, 90 Veggie Softgels

Doctor's BestClinical88Dose fit72Popularity96$0.26/ serving