How it may work
A biosynthetic precursor in NAD+ metabolism.
Guide-level evidence orientationEvidence level C
Level C describes limited, mixed or context-dependent human evidence for this exact question; read the conclusion for direction and limits.
This guide-level grade is an orientation, not a direction-of-effect label, product grade, claim or personal recommendation.Why people are interested
A raw material the body can use to make NAD+, a molecule involved in cellular energy. It can change biomarkers, but lasting benefits remain uncertain.
Library trackResearch Radar
Last reviewed20 Aug 2026
Guide scopeIngredient research only
What people have studied
Short trials show biomarker and selected functional signals; durable clinical benefit and long-term safety remain uncertain.
What to consider
Long-term, population-specific safety is not established.
Local pathway
Novel-food and source review required; no definitive positive-list route identified.
Sources + indexes
See where the explanation comes from.
Open the linked research and official records behind this guide. Early topics may begin with a research index while stronger sources are added.