NAD+ Supplements and Healthy Ageing: A Simple Summary of the Research
This article is a simple summary of a scientific review called NAD+ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence. The review was published in Ageing Research Reviews in 2026. It looked at the evidence behind NAD+ supplements, anti-ageing claims, wellness benefits and healthy ageing.
This summary has been written in simple language for readers who are interested in health, longevity and supplements, but who do not want complicated scientific language. You can also visit our main website and shop at Pryhelm.com.
What Is NAD+?
NAD+ is short for nicotinamide adenine dinucleotide. It is a molecule found inside the body. It plays an important role in helping our cells make energy. It is also involved in processes linked to repair, metabolism and healthy cell function.
As people get older, NAD+ levels may decline. This has led to a lot of interest in NAD+ supplements and NAD+ boosting treatments. Many wellness companies now talk about NAD+ as something that may support energy, healthy ageing and longevity.
However, it is important to understand the difference between an interesting scientific idea and a proven health benefit. Just because something affects the body does not automatically mean it will make people live longer, feel younger or become healthier in a clear and measurable way.
What Did the Review Look At?
The review looked at human and animal studies published between January 2010 and October 2025. The researchers included 113 studies in total. These included 33 human intervention studies and 80 rodent studies.
This is useful because animal studies can help scientists understand possible biological effects, but human studies are more important when deciding whether a supplement actually helps people in real life.
The review looked at different NAD+ boosting approaches. These included oral supplements such as NR, NMN, nicotinamide and niacin. It also looked at injectable or intravenous approaches where available.
What Are NR and NMN?
NR stands for nicotinamide riboside. NMN stands for nicotinamide mononucleotide. These are often called NAD+ precursors. This means the body can use them as building blocks to make more NAD+.
Many NAD+ supplements on the market use NR or NMN because taking NAD+ itself by mouth may not be the most direct way to raise NAD+ inside cells. Instead, the idea is to give the body ingredients that help it produce more NAD+.
What Did the Animal Studies Show?
The animal studies were often promising. In rodent models, NAD+ boosting was frequently linked with improvements in metabolism, mitochondrial function, inflammation and physical function.
Mitochondria are often described as the energy-producing parts of the cell. Because NAD+ is connected to energy production, it makes sense that scientists are interested in whether NAD+ support could help with ageing and cell function.
However, animal studies do not always translate into the same results in humans. A mouse may show improvements in a laboratory study, but that does not guarantee the same effect will happen in a healthy adult taking a supplement.
What Did the Human Studies Show?
The human results were more cautious. The review found that oral NAD+ precursors, especially NR and NMN, can raise NAD-related markers in the body. This means these supplements do appear to have biological activity.
In simple words, the supplements can change certain blood or cell markers linked to NAD+. That is important because it shows the body is responding.
However, changing a marker is not the same as proving a clear health benefit. The review found that results for real-world outcomes were mixed. Some studies showed possible benefits in certain areas, while others found little or no clear effect.
The outcomes looked at included metabolism, vascular health, physical performance and other areas linked to healthy ageing. The results were not strong enough to say that NAD+ supplements definitely improve wellness or slow ageing in humans.
Are NAD+ Supplements Proven for Anti-Ageing?
Based on this review, the answer is not yet.
NAD+ supplements may raise NAD-related biomarkers, and the science is interesting. But the review concluded that the clinical evidence for anti-ageing and wellness benefits is still inconclusive.
This means there is not enough strong human evidence yet to say that NAD+ supplements reliably make people live longer, age more slowly, improve energy, or improve healthspan in a meaningful way.
Healthspan means the number of years a person lives in good health. This is different from lifespan, which simply means how long a person lives.
What About NAD+ IV Drips and Injections?
One of the most important points in the review is about intravenous and intramuscular NAD+ treatments. These are sometimes offered in wellness clinics and promoted for energy, anti-ageing and recovery.
The review found no eligible outcomes trials testing intravenous or intramuscular NAD+ itself for anti-ageing or wellness purposes.
This is important because IV NAD+ treatments are often expensive and heavily marketed. According to this review, the evidence for these treatments is not strong enough to support many of the bold claims made about them.
Were NAD+ Supplements Safe?
The review found that oral NR and NMN were generally well tolerated in human studies lasting weeks to months.
However, this does not mean every person should take them without thinking. Supplements can affect people differently. Some people may have medical conditions, take medication, or have personal health risks that make certain supplements unsuitable.
If you have a medical condition, take prescription medication, are pregnant or breastfeeding, or are unsure whether a supplement is right for you, it is sensible to speak with a qualified healthcare professional first.
The Main Message of the Review
The main message is balanced. NAD+ boosting is biologically active. Oral NR and NMN can raise NAD-related markers in humans. Animal studies are often promising. But the evidence for clear anti-ageing and wellness benefits in humans is not yet strong enough.
In simple words, NAD+ is interesting, but it is not proven as a magic anti-ageing solution.
The researchers say that larger and better human trials are needed. These studies should last longer and should measure outcomes that really matter, such as physical function, energy, metabolic health, disease risk and long-term wellbeing.
What Does This Mean for Everyday Wellness?
For people interested in healthy ageing, the best approach is still to focus on the basics first.
Good sleep, regular movement, strength training, a balanced diet, enough protein, enough fibre, hydration, stress management and sensible medical care are still the foundation of long-term health.
Supplements may have a place, but they should support a healthy lifestyle, not replace one.
This is especially important in the longevity space, where new trends can become popular before the science is fully settled. A supplement can be promising without being proven. It can raise a biomarker without clearly improving health. It can be interesting without being essential.
Why This Research Matters
This review matters because NAD+ supplements are becoming popular. Many people are spending money on products that promise better ageing, more energy and improved wellness.
The review helps separate the science from the hype. It shows that NAD+ research is a serious area of study, but it also shows that marketing claims may be ahead of the evidence.
That does not mean NAD+ supplements are useless. It means we should be careful, realistic and honest about what is currently known.
A Simple Takeaway
The simple takeaway is this:
NAD+ is important in the body. NAD+ levels may change with age. Some supplements can raise NAD-related markers. Animal studies look promising. Human studies show biological activity, but clear anti-ageing and wellness benefits are still not proven.
For now, NAD+ supplements should be seen as an interesting area of research, not a guaranteed longevity solution.
Final Thoughts
At Pryhelm Blog, we are interested in wellness, health, supplements and longevity research. But we also believe in a balanced approach. Good health should not be built on hype, fear or unrealistic promises.
As more research is published, we will continue to discuss it in simple language. If you are interested in healthy ageing, supplements and practical wellness, please bookmark this blog and come back again. New research and new topics will be added over time.
You can read the original scientific article here: NAD+ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence.
You can also visit the main Pryhelm website and shop here: Pryhelm.com.
Important Note
This article is for general information only. It is not medical advice. Always speak with a qualified healthcare professional before starting a new supplement, especially if you have a medical condition or take medication.