The quest for eternal youth is as old as humanity itself, and in the modern era, it has taken a new form: the anti-ageing supplement. Among the most hyped compounds are NMN, NAD+, and resveratrol, each touted for their ability to slow the ageing process by targeting cellular mechanisms. But are these supplements the elixir of youth, or just another fad? Let's dive into the science and separate fact from fiction. Personally, I think the supplement industry has a lot to answer for when it comes to misleading claims, but the science behind these compounds is fascinating and holds promise. However, the reality is far more nuanced than the marketing suggests.
The Promise of NAD+, NMN, and Resveratrol
NAD+ and the Elixir of Youth
Nicotinamide adenine dinucleotide (NAD+) is a coenzyme found in all living cells, playing a crucial role in energy metabolism, DNA repair, inflammation, and cellular stress responses. As we age, NAD+ levels tend to decline, which has been linked to reduced mitochondrial function and other ageing-related changes. This has led to the development of NAD+ supplements and creams, with the claim that they can reverse the ageing process. However, the evidence for this is still very limited. While NAD+ is essential for skin-cell energy and repair, it's unclear whether topical application in creams can effectively penetrate the skin and produce meaningful anti-ageing effects. In fact, better-established ingredients like sunscreen, retinoids, and niacinamide currently have stronger evidence for improving visible signs of skin ageing.
NAD+ Precursors: NMN and NR
Because NAD+ itself is not efficiently absorbed when swallowed, much research has focused on NAD+ precursors, such as nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR). In animal studies, these compounds have shown promising results, improving energy metabolism, insulin sensitivity, and physical function in older mice. Some studies have also reported improvements in healthspan and lifespan-related measures in animal models, although these findings vary by model and do not neatly translate into humans. Human clinical trials suggest that NMN and NR can raise NAD+ levels or related markers of NAD+ activity in blood and tissues, but the strongest evidence is for changes in blood, while evidence for meaningful effects in specific tissues is still limited.
Resveratrol: The Polyphenol Powerhouse
Resveratrol, found in red grapes, berries, and peanuts, is another compound often promoted for anti-ageing. Unlike NMN and NR, resveratrol is not an NAD+ precursor. In laboratory and animal studies, resveratrol has been associated with lower levels of inflammation and improved mitochondrial function. However, the difficulty is that resveratrol has poor oral bioavailability, meaning much of what is swallowed is broken down or modified before it can reach tissues in the form and concentration used in laboratory experiments. Human trials have not shown convincing evidence that resveratrol slows ageing, and findings on cardiovascular and anti-inflammatory benefits remain mixed. Additionally, resveratrol may interact with certain medications, and high doses can cause side effects.
The Reality Check
So, are NAD+, NMN, and resveratrol the elixir of youth? In my opinion, no. The key distinction is between biological plausibility and proven benefit. These compounds are not biologically implausible; they act on real pathways involved in energy production, stress responses, and cellular maintenance. However, affecting a pathway is not the same as slowing ageing in a person. The evidence so far suggests possible benefits in limited contexts, but major questions remain about long-term safety, optimum doses, and who is most likely to benefit. The science is plausible, but the marketing often turns "this affects a process associated with ageing" into "this supplement will keep you young".
The Bottom Line
For now, the best-supported ways to support healthy ageing remain far less glamorous: regular exercise, good sleep, a balanced diet, avoiding smoking, limiting alcohol, and managing long-term health conditions. Supplements may eventually prove useful, but at present, the evidence for staying younger for longer is much stronger for everyday habits than for anti-ageing products. The quest for eternal youth is a complex and multifaceted journey, and while these supplements may offer some benefits, they are not a panacea. The science is promising, but the marketing often oversells the results, leaving consumers with unrealistic expectations. As an expert, I would advise caution and a critical eye when considering these supplements, and instead, focus on the well-established habits that truly contribute to healthy ageing.
