Nicotinamide Riboside (NR)

nicotinamide riboside · NR · niagen

The other headline NAD⁺ precursor, marketed alongside NMN for cellular energy.

TipoSupplement / dietary

Il voto risponde a: What does the human evidence support for: NAD⁺ precursor?

Grado

Moderata

Il voto misura la qualità dell'evidenza, non è un consiglio ad assumere o acquistare.

Classe: Cellular metabolism
Uso principale: NAD⁺ precursor
Forza evidenza: medium
Ultima revisione: 2026-07-01

In sintesi

Like NMN, it reliably raises blood NAD⁺ in humans — and, like NMN, that hasn't yet translated into proven clinical benefit. Well tolerated, biologically real, clinically unproven.

Cosa dice l'evidenza

Nicotinamide riboside is NMN's close cousin, one step earlier in the NAD⁺ salvage pathway. Human trials consistently show it raises blood NAD⁺ and is safe over weeks to months — that part is solid. What's missing is the same thing missing for NMN: convincing effects on hard clinical endpoints (physical function, disease, longevity) rather than on the NAD⁺ number itself. Grade B mirrors NMN: a genuine biological effect without proof it changes how you age.

Studi chiave

[1]
Nicotinamide riboside raises NAD⁺ in humans (RCTs) · RCT
Reliable rise in blood NAD⁺; safe short-term.
Apri su PubMed ↗
[2]
NR and clinical/functional outcomes · review
Surrogate markers move; hard endpoints not established.
Apri su PubMed ↗
[3]
NAD⁺ precursors in aging (review) · review
Places NR and NMN in the same evidence bracket.
Apri su PubMed ↗

Vedi tutti gli studi su PubMed ↗

Meccanismo

Converted to NAD⁺ via the salvage pathway (NR → NMN → NAD⁺), supporting sirtuin and PARP activity involved in DNA repair and metabolic regulation.

Sicurezza

Well tolerated in human trials with no serious adverse events at studied doses; long-term (multi-year) safety data are still limited.

Contesto dosaggio

Trials commonly use ~250–1000 mg/day. Head-to-head evidence that NR is meaningfully better or worse than NMN is lacking; the choice is often driven by price and marketing rather than data.

Esempi di applicazione

Taken as a daily morning capsule, much like NMN.
Often chosen over NMN on price, since the evidence is similar.
Sometimes paired with TMG on theory, though that pairing isn't proven.

Nota dal campo

NR and NMN are sold as rivals; in the evidence they're near-twins. We grade both B and make the same point: the NAD⁺ goes up, the proof that it makes you healthier isn't there yet.

Molecole correlate

NMNB

Come assegniamo i gradi → Metodo