The short answer · Precancerous lesion progression

21st Century, Niacinamide, Prolonged Release , 110 Tablets
4.6· 4,534 ratings· $0.05/serving
Niacinamide 500 mg — inside the studied 500-1000 mg window
Of 2,199 products scored for Precancerous lesion progression, 21st Century, Niacinamide, Prolonged Release , 110 Tablets ranks #1 with a DoseRank score of 86. Niacinamide is the strongest evidence signal for this outcome.
Niacinamide is the strongest evidence signal for this outcome.
Strong evidence · 500 mg
Non-flushing form of vitamin B3; serves as a NAD+ precursor for energy metabolism and DNA repair, and is preferred over niacin when avoiding flush.
Niacinamide at 500 mg lands inside the studied 500-1000 mg window.
Niacinamide
Studied window 500-1000 mg · this pick 500 mg
Questions
21st Century, Niacinamide, Prolonged Release , 110 Tablets ranks #1 for Precancerous lesion progression with a DoseRank score of 86. The score blends clinical strength, evidence, dose fit, trust signals and value across 2,199 products scored for this outcome.
Niacinamide is the strongest evidence signal for this outcome.
Niacinamide at 500 mg lands inside the studied 500-1000 mg window. DoseRank scores this product's dose fit at 67 out of 100.
21st Century, Niacinamide, Prolonged Release , 110 Tablets works out at $0.05 per serving. $0.05 per serving — low price tier for this outcome. Nothing else in this ranking costs less per serving.
No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.
Keep exploring
Retailer links may be affiliate links. Rankings and placement are never paid.
Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
$0.05 per serving — low price tier for this outcome. Nothing else in this ranking costs less per serving.
Ready?
The #1 pick is $0.05 a serving.21st Century, Niacinamide, Prolonged Release , 110 Tablets — in stock at a tracked retailer.
View on iHerbA saved, shareable breakdown: your matched products, dose math, and interaction flags to discuss with a clinician.
Or take the 60-sec quiz →