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.

Reduce colds

What this outcome means

Common cold incidence is how often you catch those familiar upper-respiratory bugs, the sniffles, sore throats, and congestion that circulate through a season. On DoseRank it maps to a defined health outcome built from human studies on cold episode counts, infection frequency, and number of illnesses per season – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Catches every bugSeems to pick up each cold that passes through home or work.

Crowded-environment exposureCommuters, teachers, and parents constantly around coughs and shared surfaces.

Run-down and susceptibleBusy, low-sleep stretches when colds seem to land more easily.

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

Evidence level

78Moderate-strong

Probiotic Blends – 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 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 available ingredients

Probiotic Blends 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: Probiotic Blends 30000000000 CFU vs 1000000000-15000000000 CFU.

Processed

5.5k

Available

5.5k

Ingredients

Brands

460

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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Take 60-sec quiz

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.

Reduce colds

What this outcome means

Who it's for

Catches every bugSeems to pick up each cold that passes through home or work.

Crowded-environment exposureCommuters, teachers, and parents constantly around coughs and shared surfaces.

Run-down and susceptibleBusy, low-sleep stretches when colds seem to land more easily.

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

Evidence level

78Moderate-strong

Best available ingredients

Probiotic Blends 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: Probiotic Blends 30000000000 CFU vs 1000000000-15000000000 CFU.

Processed

5.5k

Available

5.5k

Ingredients

Brands

460

Coverage

100%

Relevant ingredients

Which ingredient types matter for common cold incidenceOpen to see which ingredient types matter for common cold incidence

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

Use types to filter ranked products

Botanicals/Herbal Extracts

125 products

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

Typical: ,

Probiotics & Microorganisms

498 products

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

Typical: ,

Fibers & Prebiotics

24 products

Indigestible carbs that feed gut bacteria and add bulk. Start low and ramp slowly – too much too fast means bloating and gas.

Typical:

Top decision cards

Best products for common cold incidence

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for common cold incidence

California Gold Nutrition, LactoBif® 30 Probiotics, 30 Billion CFU, 120 Veggie Capsules

California Gold Nutrition$0.27 / serving4.7 · 167,750Available now

Also helps with

Atopic dermatitis symptoms

Diarrhea

Digestive comfort

Why this ranks here

Evidence fitProbiotic Blends has moderate human evidence for this outcome.
Dose fitProbiotic Blends at 30000000000 CFU is higher than the studied 1000000000-15000000000 CFU window.
Price / serving$0.27 per serving — mid 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

30000000000 CFUAbove rangehigher than the studied 1000000000-15000000000 CFU window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

NOW Foods, Probiotic-10™, 100 Veg Capsules

NOW FoodsClinical88Dose fit92Popularity99$0.29/ serving

California Gold Nutrition, Probiotics with Lactobacillus acidophilus, Bifidobacterium lactis, Lactobacillus plantarum, and Lactobacillus casei, 10 Strain Blend, 25 Billion CFU, 60 Veggie Capsules

California Gold NutritionClinical88Dose fit92Popularity98$0.27/ serving

NOW Foods, Probiotic-10™ 25 Billion, 50 Veg Capsules

NOW FoodsClinical88Dose fit92Popularity99$0.30/ serving

California Gold Nutrition, LactoBif® 5 Probiotics, 5 Billion CFU, 120 Veggie Capsules

California Gold NutritionClinical86Dose fit73Popularity99$0.13/ serving

Nutrition Now, PB 8™ Probiotic, 120 Capsules (7 Billion CFU per Capsule)

Nutrition NowClinical87Dose fit88Popularity91$0.28/ serving

California Gold Nutrition, CranMax® LactoBif® Probiotics, 25 Billion CFU, 90 Veggie Capsules

California Gold NutritionClinical88Dose fit92Popularity84$0.36/ serving

Best Naturals, Probiotic, 120 Vegetarian Capsules

Best NaturalsClinical88Dose fit93Popularity76$0.18/ serving

InnovixLabs, Multi-Strain Probiotic, 60 Capsules

InnovixLabsClinical88Dose fit95Popularity98$0.52/ serving

California Gold Nutrition, Women's Probiotics with Probiotic Bacteria Blend, Bifidobacterium lactis, Lactobacillus acidophilus, and Lactobacillus rhamnosus, 20 Billion CFU, 60 Veggie Capsules

California Gold NutritionClinical87Dose fit91Popularity96$0.37/ serving