Increase VO2 max

What this outcome means

Aerobic capacity is how much oxygen your body can take in and use at peak effort, setting the ceiling on your endurance. On DoseRank it maps to a defined health outcome built from human studies on VO2 max, oxygen uptake, and time-to-exhaustion during exercise – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Endurance athletesRunners and cyclists chasing a higher aerobic ceiling.

Winded easilyOut of breath during efforts that should feel manageable.

Fitness rebuildersRebuilding stamina after a long stretch of inactivity.

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

Evidence level

78Moderate-strong

Ashwagandha – 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 87 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

Ashwagandha is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 87

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Ashwagandha 900 mg vs 300-1000 mg.

Processed

1.6k

Available

1.6k

Ingredients

Brands

271

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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Questions

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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 VO2 max

What this outcome means

Who it's for

Endurance athletesRunners and cyclists chasing a higher aerobic ceiling.

Winded easilyOut of breath during efforts that should feel manageable.

Fitness rebuildersRebuilding stamina after a long stretch of inactivity.

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

Evidence level

78Moderate-strong

Best available ingredients

Ashwagandha is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 87

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Ashwagandha 900 mg vs 300-1000 mg.

Processed

1.6k

Available

1.6k

Ingredients

Brands

271

Coverage

100%

Relevant ingredients

Which ingredient types matter for aerobic capacity (vo2 max)Open to see which ingredient types matter for aerobic capacity (vo2 max)

95 products across 1 ingredient types — open to filter the ranking.

Use types to filter ranked products

Vitamins

95 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:

Top decision cards

Best products for aerobic capacity (vo2 max)

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for aerobic capacity (vo2 max)

Swanson Vitamins, Full Spectrum® Ashwagandha, 100 Vegan Capsules (450 mg per Capsule)

Swanson Vitamins$0.14 / serving4.7 · 29,965Available now

Why this ranks here

Evidence fitAshwagandha has moderate human evidence for this outcome.
Dose fitAshwagandha at 900 mg lands inside the studied 300-1000 mg window.
Price / serving$0.14 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.

Trade-offs

Value for money trails the rest of this listEvidence depth trails the rest of this list

The numbers

900 mgIn rangeinside the studied 300-1000 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products