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 its 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 this is a fascinating topic, and what makes it particularly intriguing is the balance between biological plausibility and proven benefit. While these compounds are not biologically implausible, the evidence for their anti-ageing effects in humans is still limited and often contradictory. In my opinion, the key to understanding this lies in the distinction between biological plausibility and proven benefit. These compounds affect real pathways involved in energy production, stress responses, and cellular maintenance, but that doesn't automatically translate to slower ageing in a person. From my perspective, the most compelling evidence for anti-ageing benefits comes from lifestyle factors. Regular exercise, good sleep, a balanced diet, avoiding smoking, and limiting alcohol are all well-supported ways to support healthy ageing. These habits have a strong track record of improving health and longevity, and they are backed by a wealth of scientific research. What many people don't realize is that the supplement industry is still in its infancy when it comes to anti-ageing products. While animal studies have shown promising results for NAD+ precursors like NMN and NR, the translation to humans has been far more challenging. One major problem is the long-term nature of ageing. Ageing unfolds over decades, while most supplement trials last only weeks or months. This makes it difficult to draw meaningful conclusions about the long-term effects of these compounds. A detail that I find especially interesting is the role of resveratrol. Unlike NMN and NR, resveratrol is not an NAD+ precursor, but it has been associated with lower levels of inflammation and improved mitochondrial function in laboratory and animal studies. However, its poor oral bioavailability poses a significant challenge. This means that much of what is swallowed is broken down or modified before it can reach tissues in the form and concentration used in laboratory experiments. What this really suggests is that the gap between laboratory findings and real-world effects is substantial. In my view, the most promising avenue for anti-ageing research is the exploration of NAD+ precursors like NMN and NR. While the evidence for their benefits is still limited, the science is compelling. These compounds have the potential to raise NAD+ levels in the body, which could have a range of positive effects on cellular processes. However, it's important to approach these supplements with caution. The marketing often overstates the benefits, turning "this affects a process associated with ageing" into "this supplement will keep you young". In conclusion, while the science behind anti-ageing supplements is fascinating, the evidence for their benefits in humans is still limited. The best-supported ways to support healthy ageing remain the tried-and-true habits of regular exercise, good sleep, a balanced diet, and avoiding smoking. Supplements may eventually prove useful, but for now, the evidence for staying younger for longer is much stronger for everyday habits than for anti-ageing products. So, are NAD+, NMN, and resveratrol the elixir of youth? Not quite. But they do offer a glimpse into the future of ageing, and the journey towards a longer, healthier life is an exciting one.
