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.

Increase antioxidant capacity

What this outcome means

Antioxidant capacity is your body's measured ability to neutralize reactive molecules and keep oxidative stress in check. On DoseRank it maps to a defined health outcome built from human studies on total antioxidant capacity assays, oxidative stress markers, and lipid peroxidation levels – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

High oxidative loadHeavy training, pollution, or smoking that raises oxidative stress.

Metabolically stressedConditions where reactive molecules outpace the body's defenses.

Prevention-mindedPeople tracking oxidative markers as part of long-term health.

Stack buildersAlready taking supplements such as Ascorbic Acid or Selenomethionine and want the dose right.

Evidence level

85Strong

Selenomethionine – has strong public evidence, and Ascorbic Acid adds supporting evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 67 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 ingredients

Selenomethionine leads this outcome, supported by Ascorbic Acid.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Ascorbic Acid 500 mg vs 500-1000 mg, Selenomethionine 50 mcg vs 50-200 mcg.

Processed

11.1k

Available

11.1k

Ingredients

118

Brands

549

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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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.

Increase antioxidant capacity

What this outcome means

Who it's for

High oxidative loadHeavy training, pollution, or smoking that raises oxidative stress.

Metabolically stressedConditions where reactive molecules outpace the body's defenses.

Prevention-mindedPeople tracking oxidative markers as part of long-term health.

Stack buildersAlready taking supplements such as Ascorbic Acid or Selenomethionine and want the dose right.

Evidence level

85Strong

Best ingredients

Selenomethionine leads this outcome, supported by Ascorbic Acid.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Ascorbic Acid 500 mg vs 500-1000 mg, Selenomethionine 50 mcg vs 50-200 mcg.

Processed

11.1k

Available

11.1k

Ingredients

118

Brands

549

Coverage

100%

Relevant ingredients

Which ingredient types matter for antioxidant capacityOpen to see which ingredient types matter for antioxidant capacity

14.1k products across 8 ingredient types — open to filter the ranking.

Use types to filter ranked products

Antioxidants & Bioactive Compounds

2.9k products

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

Typical: , , , ...

Vitamins

4.8k products

Essential micronutrients the body can't make in sufficient amounts. Fat-soluble ones (A, D, E, K) store up; water-soluble ones need regular topping-up.

Typical: , , , ...

Amino Acids & Derivatives

888 products

The building blocks of protein, taken singly for targeted effects – leucine for muscle, theanine for calm. Free-form versions absorb fast on an empty stomach.

Typical: , ,

Minerals & Trace Elements

2.3k products

Inorganic nutrients from calcium to zinc. The chemical form drives absorption – chelates and citrates usually beat cheap oxides.

Typical: , , , ...

Botanicals/Herbal Extracts

2.5k products

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

Typical: , , , ...

Enzymes

41 products

Proteins that speed specific reactions, from digesting food to thinning fibrin. Taken with meals for digestion or away from food for systemic effects.

Typical:

Hormones & Hormone-like Compounds

620 products

Compounds that signal like the body's own hormones — melatonin, DHEA, pregnenolone. Powerful at tiny doses and easy to overdo; timing matters more than potency.

Typical:

Glandulars & Animal-Derived Extracts

89 products

Animal gland and organ-tissue extracts used traditionally for targeted organ support. Purity and grass-fed sourcing are the key quality markers.

Top decision cards

Best products for antioxidant capacity

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for antioxidant capacity

California Gold Nutrition, Defender 4, with Vitamin C, Vitamin D, Zinc & Selenium, 180 Veggie Capsules

California Gold Nutrition$0.07 / serving4.7 · 187,120Available now

Also helps with

Vitamin C status

Selenium status

Zinc status

Why this ranks here

Evidence fitSelenomethionine leads the evidence here, backed by Ascorbic Acid.
Dose fit2 of 2 dosed ingredients land in the studied range. Ascorbic Acid at 500 mg lands inside the studied 500-1000 mg window.
Price / serving$0.07 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

The numbers

500 mgIn rangeinside the studied 500-1000 mg window

50 mcgIn rangeinside the studied 50-200 mcg window

25 mcg

10 mg

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Centrum, Men Complete Multivitamin, 120 Tablets

CentrumClinical95Dose fit71Popularity98$0.12/ serving

American Health, Ester-C® with Citrus Bioflavonoids, 225 Vegetarian Tablets

American HealthClinical96Dose fit82Popularity84$0.15/ serving

NOW Foods, Daily Vits™, Multi Vitamin & Mineral, 250 Tablets

NOW FoodsClinical95Dose fit69Popularity91$0.09/ serving

California Gold Nutrition, Defender 7, with A, C, D3, B6, Zinc, Selenium & Beta-Glucan, 180 Veggie Capsules

California Gold NutritionClinical96Dose fit67Popularity80$0.11/ serving

One-A-Day, Men's Multi, 200 Tablets

One-A-DayClinical95Dose fit67Popularity84$0.10/ serving

Nutricost, Multivitamin, Probiotics + 22 Vitamins & Minerals , 120 Capsules

NutricostClinical97Dose fit75Popularity91$0.21/ serving

Life Extension, Two-Per-Day Multivitamin, 120 Tablets

Life ExtensionClinical96Dose fit75Popularity99$0.29/ serving

California Gold Nutrition, Multivitamin & Mineral, Two-A-Day, 60 Veggie Capsules

California Gold NutritionClinical99Dose fit76Popularity98$0.56/ serving

NATURELO, One Daily Multivitamin, For Men, 120 Vegetarian Capsules

NATURELOClinical96Dose fit67Popularity89$0.28/ serving