Marketers say NAD+ pills and infusions can boost longevity. What's the evidence?
Researchers warn that the hype around NAD+ supplements and therapies—marketed by wellness clinics and celebrities—outpaces the scientific evidence, despite preliminary studies in animals showing potential benefits for aging and disease. While NAD+ plays a critical role in cellular energy and DNA repair, human trials using precursors like NR and NMN remain limited, with only small-scale studies showing promise in specific conditions like prediabetes and Parkinson’s disease.
The market for NAD+ supplements, injectables, and IV infusions is booming, fueled by claims that the compound can reverse aging, boost energy, and improve recovery. Wellness clinics and biohackers promote NAD+ as a 'fountain of youth,' citing its role in mitochondrial function and DNA repair, but experts warn the science hasn’t caught up to the hype. NAD+ is a vital molecule for cellular energy and health, with levels declining as people age. Dr. Shalender Bhasin, director of the Boston Pepper Aging Research Center, notes that while NAD+ holds promise as a longevity therapy, large-scale human studies are still needed to confirm benefits. Most research so far has been conducted on animals, where NAD+ has shown improvements in mitochondrial health, strength, and metabolic function. Human trials have primarily tested NAD+ precursors like nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN), with small studies showing potential in specific groups. For example, research in women with prediabetes and patients with Parkinson’s disease or peripheral artery disease has yielded promising but limited results. Christopher Martens, director of the Delaware Center for Cognitive Aging Research, cautions that the excitement may be premature, as the evidence in humans remains inconclusive. Critics argue that the rapid commercialization of NAD+ therapies—often costing hundreds or thousands of dollars—is driven by marketing rather than solid science. Dr. Samuel Klein of Washington University School of Medicine emphasizes that while NAD+ works wonders in rodents, human applications are still speculative. The body naturally produces NAD+ from dietary sources like vitamin B3 and the amino acid tryptophan, and deficiencies can lead to serious conditions like pellagra. Regulatory oversight of NAD+ products is also a concern, as many supplements lack rigorous testing. Experts urge caution, stressing that the long-term safety and efficacy of NAD+ augmentation in humans remain unproven. Until larger, well-designed studies are completed, the claims about NAD+ as a longevity solution should be viewed with skepticism.
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