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.

Improve microcirculation

What this outcome means

Microcirculation is blood flow through your smallest vessels and capillary beds, where oxygen and nutrients actually reach your tissues. On DoseRank it maps to a defined health outcome built from human studies on capillary blood flow, tissue perfusion, and endothelial function – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Cold hands and feetExtremities that turn cold or pale when small-vessel flow lags.

Metabolic strainDiabetes or high blood sugar that wears on tiny vessels over time.

Performance-mindedAthletes seeking better oxygen delivery to working muscle.

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

Evidence level

92Strong

Gotu Kola – has strong public evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 93 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

Gotu Kola is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 93

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Above range: Gotu Kola 435 mg vs 60-180 mg.

Processed

1.4k

Available

1.4k

Ingredients

Brands

177

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.

Improve microcirculation

What this outcome means

Who it's for

Cold hands and feetExtremities that turn cold or pale when small-vessel flow lags.

Metabolic strainDiabetes or high blood sugar that wears on tiny vessels over time.

Performance-mindedAthletes seeking better oxygen delivery to working muscle.

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

Evidence level

92Strong

Best ingredients

Gotu Kola is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 93

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Above range: Gotu Kola 435 mg vs 60-180 mg.

Processed

1.4k

Available

1.4k

Ingredients

Brands

177

Coverage

100%

Relevant ingredients

Which ingredient types matter for microcirculationOpen to see which ingredient types matter for microcirculation

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

Use types to filter ranked products

Botanicals/Herbal Extracts

298 products

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

Typical: ,

Antioxidants & Bioactive Compounds

615 products

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

Typical: , ,

Top decision cards

Best products for microcirculation

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for microcirculation

Swanson Vitamins, Full Spectrum® Gotu Kola, 435 mg, 60 Capsules

Swanson Vitamins$0.06 / serving4.7 · 1,875Available now

Also helps with

Edema

Wound healing

Why this ranks here

Evidence fitGotu Kola is the strongest evidence signal for this outcome.
Dose fitGotu Kola at 435 mg is higher than the studied 60-180 mg window.
Price / serving$0.06 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

435 mgAbove rangehigher than the studied 60-180 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Nature's Way, Gotu Kola Herb, 180 Vegan Capsules (475 mg per Capsule)

Nature's WayClinical89Dose fit97Popularity89$0.16/ serving

NOW Foods, Ginkgo Biloba, 60 mg, 60 Veg Capsules

NOW FoodsClinical89Dose fit90Popularity68$0.12/ serving

Deva, Vegan Organic Ginkgo Biloba, 90 Tablets (300 mg Per tablet)

DevaClinical89Dose fit91Popularity84$0.09/ serving

NOW Foods, Gotu Kola, 450 mg, 100 Veg Capsules

NOW FoodsClinical89Dose fit97Popularity76$0.14/ serving

Swanson Vitamins, Gotu Kola Extract, Standardized, 100 mg, 120 Capsules

Swanson VitaminsClinical89Dose fit94Popularity68$0.07/ serving

NOW Foods, Ginkgo Biloba, 200 Veg Capsules

NOW FoodsClinical87Dose fit67Popularity91$0.12/ serving

NOW Foods, Ginkgo Biloba With Eleuthero Root, 100 Veg Capsules

NOW FoodsClinical87Dose fit67Popularity89$0.13/ serving

California Gold Nutrition, Ginkgo Phytosome, 360 mg, 60 Veggie Capsules

California Gold NutritionClinical89Dose fit91Popularity91$0.21/ serving

KAL, Vein Defense™, 60 Tablets

KALClinical96Dose fit84Popularity30$0.68/ serving