NAD+, science and revival of an anti-ageing ‘miracle molecule’

Nicotinamide Adenine Dinucleotide, better known as NAD+, has recently surged from obscurity to centre stage as a potential anti-ageing elixir.

Hailed by some as a ‘miracle molecule’ that can slow or even reverse ageing, NAD+ supplements and IV infusions are being promoted in wellness clinics and splashed across social media feeds. But beyond the hype, NAD+ is also the focus of serious research in cell biology and medicine.

We take a deep dive into the science of NAD+, its roller-coaster history in therapeutics and what recent findings – from science labs to plastic surgery clinics – mean for aesthetic practitioners.

NAD+ and its role in cellular health and ageing

NAD+ is an essential coenzyme present in every cell of the body, required for fundamental biological processes. It helps turn nutrients into energy and plays a key role in cellular metabolism. NAD+ functions as a molecular ‘battery’, shuttling electrons in redox reactions that underlie glycolysis, the Krebs cycle and oxidative phosphorylation. Without NAD+, cells would not convert food into ATP efficiently, and organs would fail.

This molecule also assists in repairing damaged DNA and maintaining the epigenetic integrity of the genome by serving as a substrate for enzymes such as poly(ADP-ribose) polymerases (PARPs) and sirtuins.

Crucially, NAD+ levels appear to decline with age in many tissues. By mid-adulthood, the body’s NAD+ pools are significantly lower than in youth, which may impair cells’ ability to repair themselves and maintain normal function. Research shows that altered NAD+ metabolism is linked to age-related diseases, including metabolic disorders, neurodegeneration and muscle weakness.

One reason NAD+ declines with age is an imbalance between production and consumption. DNA damage from daily life activates PARP enzymes that use NAD+ to repair genetic lesions. Inflammation and metabolic stressors can increase the activity of CD38, another NAD+-consuming enzyme. At the same time, the enzymes that rebuild NAD+ become less efficient.

In short, NAD+ is vital for both energy and repair – and now scientists are asking whether sustaining or restoring NAD+ levels could improve health or slow elements of ageing. Animal studies and early human trials suggest the answer might be yes, prompting intense interest in NAD+ as a target for interventions.

A brief history: From Vitamin B3 to ‘fountain of youth’ aspirations

NAD+ was first identified in 1906 by biochemists Arthur Harden and William John Young during yeast fermentation experiments. At the time, it was called ‘cozymase’. By the 1930s, scientists including Hans von Euler-Chelpin and Otto Warburg had deciphered NAD+’s chemical structure and its role in hydrogen transfer during metabolism. In 1938, Conrad Elvehjem discovered nicotinic acid (niacin), a form of vitamin B3 that cures pellagra by virtue of boosting NAD+.

For most of the 20th century, NAD+ was viewed largely as a nutritional and metabolic factor. While some clinics experimented with IV NAD+ for alcoholism in the 1960s, this never became mainstream.

NAD+ rose to prominence again around the early 2000s when researchers showed that NAD+ levels directly regulate sirtuins – proteins linked to ageing and longevity. Sirtuins are activated by NAD+, which repositioned NAD+ as a key factor in age-related pathways. In the mid-2010s, researchers such as David Sinclair found that giving older mice NAD+ precursors, such as nicotinamide mononucleotide (NMN), appeared to ‘rejuvenate’ certain cellular functions. Similar experiments in yeast and worms found that boosting NAD+ could extend lifespan or healthspan.

Although early optimism led to bold headlines, not all hopes about sirtuins and NAD+ translated smoothly to human medicine. Today, NAD+ is in the spotlight again, backed by expanding research but awaiting more clinical data to confirm its benefits in humans.

What the research says

A growing body of peer-reviewed studies, including a review in Cell Metabolism, suggest that NAD+ is deeply intertwined with ageing biology. Perhaps the strongest evidence comes from research in animal models, where boosting NAD+ with precursors like nicotinamide riboside (NR) or NMN has led to encouraging results. Studies report improved mitochondrial function, enhanced muscle regeneration and extended healthspan in aged mice.

A 2018 review out of Harvard Medical School summarised that NAD-boosting molecules are now considered to be highly promising for the treatment of multiple diseases and the potential extension of human lifespan.

NAD+’s role in cancer prevention remains inconclusive. While it assists DNA repair, experts note that some cancers exploit NAD+ metabolism to fuel growth. Until more is known, caution is advised when considering high-dose NAD+ therapy in patients with cancer histories.

There is also interest in NAD+’s role in neurodegenerative and metabolic disease. Some research teams are investigating NAD+ boosters in Alzheimer’s and heart failure.

Lifestyle interventions such as exercise and calorie control remain the most accessible and proven NAD+ boosters. Many healthy lifestyle behaviours, such as quality sleep and not overeating, are associated with increased levels of NAD+.

NAD+ in regenerative medicine

A major turning point in the clinical NAD+ conversation came with the American Society of Plastic Surgeons’ 2022 journal article, ‘The Role of NAD+ in Regenerative Medicine’.

This research suggests that NAD+ could influence both surgical outcomes and aesthetic treatments. Reduced NAD+ may impair the skin’s ability to cope with ultraviolet damage and slow healing post- procedure. By restoring NAD+, it might be possible to improve wound healing, cellular repair and tissue regeneration, thereby enhancing recovery and narrowing the gap in healing outcomes between older and younger patients.

From a cosmetic standpoint, NAD+ boosters might complement existing interventions such as laser resurfacing or microneedling by giving cells the metabolic ‘fuel’ needed for optimal repair.

Author Dr Nichola Conlon emphasises that declining NAD+ may impair wound healing, DNA repair and skin regeneration, all critical for successful outcomes in cosmetic and reconstructive procedures. She advocates for bridging the gap between basic science and aesthetic practice, proposing that clinicians consider NAD+ supplementation to support better recovery, particularly in older patients.

While these concepts are exciting, the article acknowledges that they are based largely on preclinical research. Rigorous human trials are required to show that NAD+ truly makes a clinical difference for surgical and aesthetic outcomes. Nonetheless, the interest of ASPS signals that NAD+ is no longer a fringe concept and the paper makes a compelling case for integrating NAD+ into regenerative treatment planning.

All in all, NAD+ has moved from an obscure coenzyme to a rising figure in anti-ageing research. Animal studies show multiple benefits, and early human trials offer guarded optimism. Although not a ‘magic bullet’, NAD+ is now recognised as a key regulator of cellular health. For health professionals, it is worth understanding how NAD+ therapies might complement care, promote better patient outcomes and support healthy ageing. AMP