What is NAD+, and why do people use it?

NAD+ is a coenzyme found in every cell. It helps your body produce energy, support metabolism, and carry out DNA repair. NAD+ levels naturally decline with age, which is why some people use NAD+ supplements as part of a wellness routine.

What do NAD+ supplements support?

People use NAD+ supplements to support cellular energy, cognitive function, metabolism, and healthy ageing. Results vary, and research is ongoing.

How can you verify that your My NAD product is genuine?

Each genuine My NAD product includes a unique authenticity verification system. You can verify your product through the official authenticity portal to confirm it is genuine.

Why is product authentication important for supplements?

Counterfeit supplements may contain incorrect ingredients, improper dosages, or poor-quality materials. Verifying authenticity helps ensure you receive a genuine product that meets quality and safety standards.

Who should consider taking NAD+ supplements?

Adults interested in supporting healthy aging, energy metabolism, cellular health, and overall wellness may consider NAD+ supplements. Always consult a healthcare professional before starting any new supplement.

Are NAD+ supplements generally well tolerated?

NAD+ supplements are generally well tolerated when you use them as directed. If you are pregnant, breastfeeding, taking medication, or managing a medical condition, you should speak with a healthcare professional before use.

Why do NAD+ levels decline with age?

Research indicates that NAD+ levels naturally decrease as we age due to changes in cellular metabolism and increased demand for DNA repair processes. This decline has led to growing interest in NAD+ supplementation.

How may My NAD products fit into a healthy aging routine?

NAD+ supports cellular energy production and DNA repair. You may use My NAD products as part of a broader routine that includes good nutrition, exercise, sleep, and regular medical guidance. Results vary from person to person.

Where can I buy genuine My NAD products in the UK?

To ensure authenticity and quality, purchase My NAD products only through the official My NAD website or authorized distributors.

NAD+ vs NMN vs NR: What's the Difference?

NAD+ Blogs

Oct 2

4 min read

NAD+, NMN, and NR are often used as though they're interchangeable in wellness marketing, but they're not quite the same thing. In short: NAD+ is the active coenzyme your cells use directly, while NMN and NR are smaller precursor molecules your body converts into NAD+. This NAD+ vs NMN vs NR comparison walks through how each one works, what the human research shows so far, and where a direct, injectable NAD+ product fits alongside oral precursors.

What Is NAD+, and Why Does the Precursor Pathway Matter?

NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every cell in the body, where it's involved in cellular energy metabolism, DNA repair signalling, and the activity of a family of proteins called sirtuins. NAD+ constantly cycles between an oxidised form (NAD+) and a reduced form (NADH) as cells carry out these processes — a relationship explored in more detail in our guide to NAD+ vs NADH. Because NAD+ itself is a relatively large, charged molecule, the body doesn't absorb much of it intact from food. Most dietary and oral-supplement routes to raising NAD+ rely instead on smaller "precursor" molecules — including NMN and NR — that cells can take up and convert into NAD+ through this salvage pathway, while injectable or IV delivery introduces NAD+ more directly, bypassing that conversion step.

What Is NMN?

NMN (nicotinamide mononucleotide) is a naturally occurring precursor one metabolic step closer to NAD+ than NR. After it's absorbed, cells convert NMN into NAD+ using an enzyme called NMNAT. NMN is typically sold as an oral capsule or powder, and published human trials have generally used daily doses in the hundreds of milligrams — though most studies remain relatively small and short in duration, so findings should be treated as preliminary rather than conclusive.

What Is NR?

NR (nicotinamide riboside) is a different precursor, structurally related to vitamin B3, that the body converts into NMN and then into NAD+ via the enzyme NRK. NR was among the first NAD+ precursors to be tested in human clinical trials, and it has a reasonably well-characterised oral pharmacokinetic and safety profile compared with some newer precursor products on the market.

Diagram showing how the NAD+ precursors NR and NMN convert into NAD+ through the body's salvage pathway, compared with direct injectable NAD+ delivery — How NAD+ precursors reach NAD+, compared with direct injectable delivery

NAD+ vs NMN vs NR: Side-by-Side Comparison

	NAD+ (direct/injectable)	NMN	NR
What it is	The finished coenzyme	Precursor, one step from NAD+	Precursor, two steps from NAD+
Typical form	Self-administered injectable	Oral capsule or powder	Oral capsule or powder
How NAD+ is raised	Supplied directly, bypassing conversion	Converted via the NMNAT enzyme	Converted via NRK, then NMNAT
Human research base	Growing, but still limited	Several small trials in metabolism/ageing research	Among the more extensively studied precursors in humans
Typical UK availability	Sold as a self-administered injectable kit	Sold as a food supplement	Sold as a food supplement

What Does the Evidence Actually Show?

Human research on NAD+ precursors is still a relatively young field, and results vary between studies, doses, and populations, so findings are best read as suggestive rather than definitive. One of the better-characterised NR studies, published in PLOS ONE, gave healthy volunteers escalating oral doses of NR up to 1,000 mg twice daily over eight to nine days and found that average blood NAD+ increased by around 100% at steady state, with individual responses ranging from roughly 35% to 168% above baseline. The supplement was reported to be well tolerated, with no adverse events recorded.

A separate study of chronic NMN supplementation in healthy older men, published in npj Aging, reported that it elevated blood NAD+ levels and was associated with changes in measures of muscle function over the study period. As with the NR research above, this is a single study in a specific population, and independent replication in larger, more diverse groups is needed before drawing firm conclusions about real-world benefits.

Research snapshot card summarising human studies on the NAD+ precursors NR and NMN and their effect on blood NAD+ levels, citing PLOS ONE and npj Aging research — A snapshot of what the current human research suggests for each precursor

Which One Is Right for You?

There's no single "best" option here. NMN and NR are both oral precursors with a reasonable evidence base, and may suit people who want a daily supplement routine alongside other NAD+-supporting habits, such as the diet, exercise, and sleep approaches covered in our guide to boosting NAD+ naturally. A direct, injectable NAD+ product is a different approach entirely: rather than relying on the body's own conversion pathway, it supplies the finished molecule directly, which is why some people choose to use it alongside — rather than instead of — an oral precursor routine. As with any supplement or injectable product, it's worth discussing your individual health history with a healthcare professional before starting, particularly if you take prescription medication.

Frequently Asked Questions

What's the main difference between NAD+, NMN, and NR?

NAD+ is the active molecule your cells use directly, while NMN and NR are smaller precursor molecules that the body has to convert into NAD+ first — NMN one step away, NR two steps away, via different enzymes in the same salvage pathway.

Can I take NAD+ directly instead of using NMN or NR?

Yes — direct NAD+ products, including injectable options, supply the finished coenzyme rather than relying on the body to convert a precursor. Some people use a direct NAD+ product alongside an oral precursor rather than choosing only one.

Is NMN or NR more effective at raising NAD+ levels?

Both have been shown to raise blood NAD+ in small human studies, but they haven't been directly compared head-to-head in the same trial, so current evidence doesn't support saying one is definitively more effective than the other.

Are NMN and NR supplements legal to buy in the UK?

Both are widely sold as food supplements in the UK. As with any supplement, it's worth buying from a reputable retailer and checking third-party testing where it's available, since oversight of supplement purity can vary between brands.

If I'm already using an injectable NAD+ product, do I still need NMN or NR?

Not necessarily — some people use only an injectable NAD+ product, some use only an oral precursor, and some combine both. It comes down to personal preference and routine, and it's a good topic to raise with a healthcare professional if you're unsure.

This article is for general informational purposes only and does not constitute medical advice. Always speak with a qualified healthcare professional before starting any new supplement or injectable therapy.