The field of NAD supplementation is full of marketing hype and wishful thinking. While NAD levels do decline with age, there's no clear evidence that raising them through supplementation provides meaningful benefits. Let's explore the key aspects of this controversial topic.
The Science
When it comes to NAD supplementation, we're taking several leaps of faith. There's no concrete evidence that artificially raising NAD levels produces positive outcomes. The body maintains NAD within specific ranges, and we don't know if pushing those levels higher is beneficial. According to research on NAD benefits, the science is still emerging.
Delivery Methods
There are three main ways to boost NAD: intravenous NAD infusions, oral NR (nicotinamide riboside), and oral NMN (nicotinamide mononucleotide). IV infusions are expensive ($300-1000) and can cause significant discomfort. Both NR and NMN supplements can increase blood NAD levels, though their effectiveness varies. NADH supplementation has been studied for various conditions.
The Evidence
The most rigorous testing program for longevity interventions, the ITP (Interventions Testing Program), found that NR supplementation failed to extend lifespan in mice - even at very high doses. The only potentially meaningful benefit found was a 60-80% reduction in basal and squamous cell carcinomas, though not in the more dangerous melanomas.
Cost vs. Benefit
The time and money spent on NAD supplementation might be better invested elsewhere. Two hours of exercise per week would likely provide greater longevity benefits than expensive NAD infusions. While NR and NMN supplements are generally considered safe, there's little evidence supporting their use for lifespan extension.
The Bottom Line
The NAD supplementation industry seems driven more by marketing than science. While these supplements might have some benefits for specific conditions, there's no compelling evidence that they extend lifespan or significantly improve healthspan. The money spent on these supplements might be better invested in proven health interventions like exercise and proper nutrition.