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.

Shorten respiratory infections

What this outcome means

Respiratory infection duration is how many days a cold, cough, or chest infection sticks around before you feel clear again. On DoseRank it maps to a defined health outcome built from human studies on symptom-day counts, time to resolution, and illness episode length – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Frequent coldsPeople who seem to catch every bug going around each season.

Slow to clearCoughs and congestion that drag on well past the first week.

High-exposure settingsParents, teachers, and commuters surrounded by circulating respiratory bugs.

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

Evidence level

92Strong

Andrographis – has strong public evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 71 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

Andrographis is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 71

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Andrographis 450 mg vs 300-1200 mg.

Processed

415

Available

415

Ingredients

Brands

128

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.

Shorten respiratory infections

What this outcome means

Who it's for

Frequent coldsPeople who seem to catch every bug going around each season.

Slow to clearCoughs and congestion that drag on well past the first week.

High-exposure settingsParents, teachers, and commuters surrounded by circulating respiratory bugs.

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

Evidence level

92Strong

Best ingredients

Andrographis is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 71

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Andrographis 450 mg vs 300-1200 mg.

Processed

415

Available

415

Ingredients

Brands

128

Coverage

100%

Relevant ingredients

Which ingredient types matter for respiratory infection durationOpen to see which ingredient types matter for respiratory infection duration

95 products across 3 ingredient types — open to filter the ranking.

Use types to filter ranked products

Botanicals/Herbal Extracts

15 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

32 products

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

Typical:

Probiotics & Microorganisms

48 products

Live beneficial bacteria and yeasts measured in CFUs. Strain identity and viability at expiry matter far more than headline colony counts.

Typical:

Top decision cards

Best products for respiratory infection duration

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for respiratory infection duration

Nutricost, Andrographis Extract, 450 mg, 180 Capsules

Nutricost$0.08 / serving4.8 · 298Available now

Also helps with

Immune function

Common cold incidence

Why this ranks here

Evidence fitAndrographis is the strongest evidence signal for this outcome.
Dose fitAndrographis at 450 mg lands inside the studied 300-1200 mg window.
Price / serving$0.08 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustMixed trust signals — ratings are positive but the base is limited.

The numbers

450 mgIn rangeinside the studied 300-1200 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Swanson Vitamins, Full Spectrum® Andrographis Paniculata, 400 mg, 60 Capsules

Swanson VitaminsClinical87Dose fit69Popularity50$0.17/ serving

Vitacost, Andrographis, 120 Capsules (600 mg per Capsule)

VitacostClinical89Dose fit90Popularity30$0.10/ serving

Herb Pharm, Andrographis, 1 fl oz (30 ml)

Herb PharmClinical88Dose fit76Popularity30$0.38/ serving

Paradise Herbs, Andrographis, 60 Vegetarian Capsules

Paradise HerbsClinical87Dose fit69Popularity30$0.45/ serving

Codeage, Quercetin Phytosome, Pineapple Tangerine, 15.22 fl oz (450 ml)

CodeageClinical53Dose fit90Popularity50$0.45/ serving

Dr. Mercola, Quercetin and Pterostilbene Advanced, 60 Capsules

Dr. MercolaClinical50Dose fit67Popularity50$1.10/ serving

Qualia, Senolytic, 12 Capsules

QualiaClinical52Dose fit78Popularity50$35.55/ serving

Revive, Immune Defense, 180 Vegetarian Capsules

ReviveClinical43Dose fit13Popularity30$1.33/ serving

Healthy Origins, Probiotic, 30 Billion CFUs, 150 Veggie Caps

Healthy OriginsClinical28Dose fit91Popularity30$0.26/ serving