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.

Slow precancerous lesion progression

What this outcome means

Precancerous lesion progression is whether abnormal-but-not-yet-cancerous tissue stays stable, regresses, or advances over time. On DoseRank it maps to a defined health outcome built from human studies on lesion grade, histology changes, and progression rates on follow-up – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Active surveillancePeople under watchful monitoring after an abnormal screening result.

Known dysplasiaThose with early tissue changes flagged on a biopsy.

High-risk historiesPeople with exposures or family patterns that raise lesion risk.

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

Evidence level

92Strong

Niacinamide – has strong public evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 67 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

Niacinamide is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Niacinamide 500 mg vs 500-1000 mg.

Processed

1.9k

Available

1.9k

Ingredients

Brands

230

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.

Slow precancerous lesion progression

What this outcome means

Who it's for

Active surveillancePeople under watchful monitoring after an abnormal screening result.

Known dysplasiaThose with early tissue changes flagged on a biopsy.

High-risk historiesPeople with exposures or family patterns that raise lesion risk.

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

Evidence level

92Strong

Best ingredients

Niacinamide is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Niacinamide 500 mg vs 500-1000 mg.

Processed

1.9k

Available

1.9k

Ingredients

Brands

230

Coverage

100%

Relevant ingredients

Which ingredient types matter for precancerous lesion progressionOpen to see which ingredient types matter for precancerous lesion progression

1.9k products across 2 ingredient types — open to filter the ranking.

Use types to filter ranked products

Vitamins

1.7k products

Essential micronutrients the body can't make in sufficient amounts. Fat-soluble ones (A, D, E, K) store up; water-soluble ones need regular topping-up.

Typical: ,

Antioxidants & Bioactive Compounds

202 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 precancerous lesion progression

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for precancerous lesion progression

NOW Foods, Niacinamide, 500 mg, 100 Veg Capsules

NOW Foods$0.08 / serving4.7 · 11,667Available now

Also helps with

Niacin status

Skin barrier function

Why this ranks here

Evidence fitNiacinamide is the strongest evidence signal for this outcome.
Dose fitNiacinamide at 500 mg lands inside the studied 500-1000 mg window.
Price / serving$0.08 per serving — low 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

500 mgIn rangeinside the studied 500-1000 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

21st Century, Niacinamide, Prolonged Release , 110 Tablets

21st CenturyClinical88Dose fit67Popularity90$0.05/ serving

NOW Foods, Niacinamide, 1,000 mg, 90 Tablets

NOW FoodsClinical89Dose fit90Popularity90$0.12/ serving

Nature's Way, Niacinamide, Non-Flushing, 500 mg, 100 Capsules

Nature's WayClinical88Dose fit67Popularity95$0.09/ serving

Solaray, Niacinamide, 500 mg, 100 VegCaps

SolarayClinical88Dose fit67Popularity90$0.10/ serving

Source Naturals, Niacinamide B-3, 1,500 mg, 100 Tablets

Source NaturalsClinical89Dose fit91Popularity77$0.11/ serving

Swanson Vitamins, Niacinamide, 500 mg, 250 Capsules

Swanson VitaminsClinical88Dose fit67Popularity90$0.06/ serving

Nutricost, Niacinamide, 500 mg, 240 Capsules

NutricostClinical88Dose fit67Popularity90$0.06/ serving

Thorne, Niacinamide, 180 Capsules (500 mg per Capsule)

ThorneClinical88Dose fit67Popularity87$0.13/ serving

Nature's Life, Energizing Niacinamide (B-3), 1,000 mg, 100 Tablets

Nature's LifeClinical89Dose fit90Popularity45$0.11/ serving