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 mouth ulcers

What this outcome means

Mouth ulcer frequency is how often painful sores crop up inside your mouth, whether they arrive in occasional bouts or keep returning. On DoseRank it maps to a defined health outcome built from human studies on ulcer episode counts, recurrence intervals, and lesion healing time – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Recurring canker soresThe same aphthous ulcers returning month after month.

Stress-linked flare-upsSores that surface during tense or run-down stretches.

Sensitive mouthsPeople prone to ulcers from minor bites or irritation.

Stack buildersAlready taking supplements such as Deglycyrrhizinated Licorice (DGL) and want the dose right.

Evidence level

78Moderate-strong

Deglycyrrhizinated Licorice (DGL) – 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 90 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

Deglycyrrhizinated Licorice (DGL) is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 90

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Deglycyrrhizinated Licorice (DGL) 800 mg vs 380-800 mg.

Processed

Available

Ingredients

Brands

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 mouth ulcers

What this outcome means

Who it's for

Recurring canker soresThe same aphthous ulcers returning month after month.

Stress-linked flare-upsSores that surface during tense or run-down stretches.

Sensitive mouthsPeople prone to ulcers from minor bites or irritation.

Stack buildersAlready taking supplements such as Deglycyrrhizinated Licorice (DGL) and want the dose right.

Evidence level

78Moderate-strong

Best available ingredients

Deglycyrrhizinated Licorice (DGL) is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 90

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Deglycyrrhizinated Licorice (DGL) 800 mg vs 380-800 mg.

Processed

Available

Ingredients

Brands

Coverage

100%

Relevant ingredients

Which ingredient types matter for mouth ulcer frequencyOpen to see which ingredient types matter for mouth ulcer frequency

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

Use types to filter ranked products

Botanicals/Herbal Extracts

73 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 mouth ulcer frequency

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for mouth ulcer frequency

NOW Foods, DGL with Aloe Vera, 400 mg, 100 Veg Capsules

NOW Foods$0.23 / serving4.7 · 2,590Available now

Also helps with

Dyspepsia or indigestion

Gastroesophageal reflux or heartburn

Gut barrier function

Why this ranks here

Evidence fitDeglycyrrhizinated Licorice (DGL) has moderate human evidence for this outcome.
Dose fitDeglycyrrhizinated Licorice (DGL) at 800 mg lands inside the studied 380-800 mg window.
Price / serving$0.23 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

800 mgIn rangeinside the studied 380-800 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Natural Factors, DGL, Deglycyrrhizinated Licorice Root Extract, 180 Chewable Tablets

Natural FactorsClinical87Dose fit68Popularity91$0.11/ serving

Swanson Vitamins, DGL, 180 Chewable Tablets

Swanson VitaminsClinical89Dose fit88Popularity84$0.15/ serving

Swanson Vitamins, DGL, 700 mg, 90 Capsules

Swanson VitaminsClinical88Dose fit84Popularity80$0.11/ serving

NaturesPlus, Herbal Actives, Licorice (DGL), 500 mg, 60 Capsules

NaturesPlusClinical87Dose fit73Popularity68$0.20/ serving

Planetary Herbals, DGL, 380 mg, 200 Chewable Tablets

Planetary HerbalsClinical86Dose fit67Popularity50$0.09/ serving

Emerald Laboratories, Leaky Gut Health, 6.45 oz (183 g)

Emerald LaboratoriesClinical87Dose fit73Popularity68$0.53/ serving

Nature's Life, DGL Licorice Chewable, 380 mg, 100 Chewables

Nature's LifeClinical86Dose fit67Popularity30$0.14/ serving

The Vitamin Shoppe, DGL, (Deglycyrrhizinated Licorice), 100 Chewable Tablets

The Vitamin ShoppeClinical89Dose fit88Popularity30$0.59/ serving

Enzymedica, DGL Stomach Soothe Gummies, German Chocolate, 74 Gummies (200 mg per Gummy)

EnzymedicaClinical87Dose fit68Popularity30$0.46/ serving