New Study Says I Was Wrong About NMN and NR?
Why It Matters
Understanding that NR and NMN merely act as cheap nicotinic‑acid sources undermines costly supplement hype and redirects focus to proven, inexpensive interventions like exercise.
Key Takeaways
- •NR and NMN both increase blood NAD via gut bacteria conversion.
- •Larger 65‑person study shows no significant difference between NR and NMN.
- •Metabolic fingerprint (NAAD) proves both precursors become nicotinic acid first.
- •Meta‑analyses find no functional benefits from NAD‑boosting supplements.
- •Exercise, not expensive NR/NMN, remains most effective way to support NAD.
Summary
The video dissects the ongoing NMN versus NR debate, highlighting a recent Bergen study that touted a 2.3‑fold NAD boost from NR. While the author initially presents the headline claim, he quickly pivots to larger, more robust data that undercuts the narrative.
A 65‑participant, double‑blind trial published in Nature Metabolism found that both NR and NMN roughly doubled circulating NAD after two weeks, with no statistically significant advantage for either. Crucially, the Bergen data also revealed elevated NAAD—a metabolite that only appears when nicotinic acid is the precursor—indicating that both supplements are first broken down by gut microbes into nicotinic acid before entering the Preiss‑Handler pathway. Independent groups from Princeton, Japan, and clinical fecal‑sample work have replicated this gut‑mediated conversion, even after intravenous dosing.
The presenter cites Brenner’s own admission that “NMN doesn’t get into cells as NMN, it gets in as NR,” and extends it to NR itself. He references a 2025 meta‑analysis of ten RCTs in adults over 60 showing no meaningful gains in muscle strength, gait speed, or metabolic markers, as well as a long‑COVID trial where tripled NAD levels failed to improve fatigue or cognition. Even exercise‑trained seniors maintain youthful muscle NAD, questioning the premise that NAD inevitably declines with age.
The takeaway for consumers and investors is clear: paying premium prices for NR or NMN supplements is unlikely to deliver measurable health benefits. The real, low‑cost lever for supporting NAD—and broader longevity—remains regular physical activity, while the supplement industry’s marketing battle appears largely moot.
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