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 asthma control

What this outcome means

Asthma control is how well your breathing stays steady day to day, with few flare-ups, little rescue-inhaler use, and minimal nighttime wheezing. On DoseRank it maps to a defined health outcome built from human studies on symptom-control scores, exacerbation frequency, and lung-function measures like FEV1 – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Frequent flare-upsRecurring attacks that disrupt sleep, work, or activity.

Exercise-induced symptomsWheezing or chest tightness that kicks in during exertion.

Trigger-sensitive airwaysSymptoms set off by pollen, dust, cold air, or smoke.

Stack buildersAlready taking supplements such as Pine Bark Extract and want the dose right.

Evidence level

60Limited

Evidence score is low, which means that there is not enough data to support the effectiveness of this outcome. However, we will continue to monitor the research and update our recommendations as new information becomes available.

Thin ingredient signal

Pine Bark Extract is the best available ingredient signal for this outcome, but the evidence is still thin.

Dose matchedDoseFit 91

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Above range: Pine Bark Extract 300 mg vs 100-200 mg.

Processed

362

Available

362

Ingredients

Brands

105

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 →

Not sure which is right for you?

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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 asthma control

What this outcome means

Who it's for

Frequent flare-upsRecurring attacks that disrupt sleep, work, or activity.

Exercise-induced symptomsWheezing or chest tightness that kicks in during exertion.

Trigger-sensitive airwaysSymptoms set off by pollen, dust, cold air, or smoke.

Stack buildersAlready taking supplements such as Pine Bark Extract and want the dose right.

Evidence level

60Limited

Thin ingredient signal

Pine Bark Extract is the best available ingredient signal for this outcome, but the evidence is still thin.

Dose matchedDoseFit 91

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Above range: Pine Bark Extract 300 mg vs 100-200 mg.

Processed

362

Available

362

Ingredients

Brands

105

Coverage

100%

Relevant ingredients

Which ingredient types matter for asthma controlOpen to see which ingredient types matter for asthma control

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

Use types to filter ranked products

Botanicals/Herbal Extracts

107 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 asthma control

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for asthma control

Nutricost, Pine Bark Extract, 180 Capsules (300 mg per Capsule)

Nutricost$0.07 / serving4.7 · 1,668Available now

Also helps with

Antioxidant capacity

Endothelial function

Blood pressure

Why this ranks here

Evidence fitEvidence is still thin for Pine Bark Extract.
Dose fitPine Bark Extract at 300 mg is higher than the studied 100-200 mg window.
Price / serving$0.07 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 100-200 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

NOW Foods, Pine Bark Extract, 240 mg, 90 Veg Capsules

NOW FoodsClinical84Dose fit91Popularity80$0.17/ serving

Source Naturals, Pine Bark Extract, 60 Tablets

Source NaturalsClinical84Dose fit91Popularity80$0.25/ serving

EVLution Nutrition, Pine Bark Extract, 90 Veggie Capsules (240 mg per Capsule)

EVLution NutritionClinical84Dose fit91Popularity50$0.07/ serving

California Gold Nutrition, French Maritime Pine Bark Extract, Oligopin, 100 mg, 60 Veggie Capsules

California Gold NutritionClinical81Dose fit67Popularity91$0.41/ serving

NOW Foods, Pycnogenol® With Amla, 60 Veg Capsules

NOW FoodsClinical81Dose fit67Popularity91$0.95/ serving

Revive, Kidney, 135 Vegetarian Capsules

ReviveClinical83Dose fit78Popularity76$1.10/ serving

Swanson Vitamins, Pycnogenol®, 100 mg, 30 Capsules

Swanson VitaminsClinical81Dose fit67Popularity84$0.85/ serving

NOW Foods, Pycnogenol®, 60 Veg Capsules

NOW FoodsClinical83Dose fit78Popularity68$1.28/ serving

MRM Nutrition, DRIVEN™, Pre-Workout Boost, Mixed Berries, 12.3 oz (350 g)

MRM NutritionClinical81Dose fit67Popularity50$0.71/ serving