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BIB_106

Chen AC et al. A Phase 3 Randomized Trial of Nicotinamide for Skin-Cancer Chemoprevention (ONTRAC). NEJM 2015;373:1618–1626. Nicotinamide 500 mg BD reduced new BCC/SCC by 23 % over 12 months. [Tasks: 05, 05a, 12] Tier: 2 Grade: A Retrieved: 2026-05-06

Evidence grade

A

Tier

2

Cited by tasks

05, 05a, 12

Identifiers

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Full extracted findings & patient-implication analysis: bibliography/BIB_106/findings.md (research corpus). This page is a short context summary — not individualised medical advice.