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# Research Synthesis: Nicotinamide Riboside NR NAD+ Effects — full paper

## Abstract

Evidence-honesty note: 16/23 retained sources are indirect, review-level, adjacent, or mechanistic and are used only to bound interpretation. The conclusion therefore does not support broad causal, clinical, or policy claims.

Nicotinamide riboside (NR) is marketed for restoring NAD+ pools during aging, yet whet…