The short answer · Cancer incidence
Take nicotinamide for cancer incidence. This is the one to buy.

Nature's Craft, Nicotinamide, 500 mg, 240 Capsules
4.7· 534 ratings· $0.11/serving
Nicotinamide 500 mg — inside the studied 500-1000 mg window
Of 1,866 products scored for Cancer incidence, Nature's Craft, Nicotinamide, 500 mg, 240 Capsules ranks #1 with a DoseRank score of 79. Nicotinamide is the strongest evidence signal for this outcome.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Nicotinamide — not Beta-Carotene or Lycopene?”Evidence Strong evidence
Nicotinamide is the strongest evidence signal for this outcome.
- NicotinamideThe pick
Strong evidence · 500 mg
Amide form of niacin (vitamin B3) that raises NAD+ without the skin flushing of nicotinic acid; also used topically for skin-barrier support.
- Beta-Carotene
Strong evidence · 900 mcg
Provitamin A carotenoid from plants; the body converts it to retinol on demand, so it avoids the toxicity risk of high-dose preformed vitamin A.
- Lycopene
Limited evidence · 50 mg
A red carotenoid pigment from tomatoes and watermelon; a potent antioxidant studied mainly for prostate health and cardiovascular protection.
The dose“Is the dose actually effective?”Dose fit 67
Nicotinamide at 500 mg lands inside the studied 500-1000 mg window.
Nicotinamide
Studied window 500-1000 mg · this pick 500 mg
The ranking“Why should I trust this pick?”Trust 68
Mixed trust signals — ratings are positive but the base is limited. 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.
- 1,866 products scored
- Never paid placement
- Evidence level: Strong · 92
- 200 brands
- 6 ingredients
The price“Can I do better than $0.11 a serving?”Value 54
$0.11 per serving — high price tier for this outcome. Nothing else in this ranking costs less per serving.
Ready?
The #1 pick is $0.11 a serving.Nature's Craft, Nicotinamide, 500 mg, 240 Capsules — in stock at a tracked retailer.
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Nature's Craft, Nicotinamide, 500 mg, 240 Capsules ranks #1 for Cancer incidence with a DoseRank score of 79. The score blends clinical strength, evidence, dose fit, trust signals and value across 1,866 products scored for this outcome.