This FoundMyFitness episode features Dr. Charles Brenner, a prominent NAD biologist and chair of the diabetes and cancer metabolism department at City of Hope, discussing NAD+ biology and its relationship to aging. The conversation covers three main areas: NAD's fundamental cellular roles (energy conversion, building molecules, and repair), why NAD levels change with age, and how NAD relates to exercise recovery and disease.
A key strength of this discussion is Brenner's careful distinction between blood NAD levels and tissue NAD pools. He pushes back against the common narrative that "NAD declines with age," clarifying that while some tissue NAD pools may be disturbed in aging, he hasn't observed consistent decline in blood NAD in healthy older adults. He notes that clinical trials examining simply older populations without extensive comorbidities show largely normal blood NAD levels. However, he acknowledges that people with multiple disease states and polypharmacy might show lower NAD, a point the host presses effectively.
Brennner discusses specific evidence from his own 2020 published research on COVID-19 infection, where his team found that coronavirus infection transcriptionally activates five members of the PARP (poly-ADP-ribose polymerase) family, which consume NAD as part of the innate immune response. This represents original research with human lung tissue samples, providing concrete mechanistic evidence for NAD consumption during viral infection. He contextualizes this within broader innate immunity principles (double-stranded RNA recognition).
The limitations of this segment include: (1) The transcript cuts off before discussion of NAD supplementation efficacy and mechanisms of NR/NMN as precursors, which are promised topics; (2) No discussion of specific clinical trial data on NAD boosting interventions and their effects on aging markers; (3) The Patriots anecdote regarding Niagen use is mentioned but not substantiated with evidence; (4) Claims about exercise recovery remain underdeveloped in the provided transcript.
Importantly, Brenner demonstrates intellectual honesty by explicitly rejecting premises he doesn't find supported ("I'm not super comfortable accepting every premise that you can pull from Instagram") and distinguishing what is known from what is speculative. He acknowledges where evidence gaps exist—for instance, regarding NAD in obese populations versus lean controls.
Viewers should take away that NAD biology is real and important, but the popular narrative about age-related NAD decline in otherwise healthy people lacks strong evidence in blood measurements. Disease states, infections, and metabolic dysfunction may genuinely disturb NAD homeostasis. The video demonstrates expert-level critical thinking about a heavily commercialized topic.
0 Comments
Log in to join the discussion.