Email: info@vitality-supplements.co.uk
Address:
Vitality Supplements
12 Deer Park Road
SW19 3TL
London
United Kingdom
NMN vs NR vs NMNH: Which NAD+ Precursor?
NMN vs NR vs NMNH
A neutral, factual comparison of the three NAD+ precursors sold as food supplements — NMN, NR and NMNH. What each molecule is, how it is thought to convert, how mature the research is, the typical doses on the market and the relative cost. No health claims — just the differences that help you choose.
Last updated July 2026 · Written by Vitality Supplements Editorial Team · ~2,300 words · 9 min read
Food supplement information — not medical advice
UK manufactured
ISO/IEC 17025 batch tested
Evidence-referenced
Neutral & factual
Quick answer
NMN, NR or NMNH — which NAD+ precursor?
NMN, NR and NMNH are three different molecules that the body can use as precursors to NAD+ (nicotinamide adenine dinucleotide). NR (nicotinamide riboside) is the smallest and has the longest history of human trials. NMN (nicotinamide mononucleotide) is one step closer to NAD+ and is the most widely discussed in longevity research. NMNH is the reduced (dihydro) form of NMN — the newest of the three, with the least human data so far. There is no single "best": the right choice depends on how much published human research you want behind it, the dose and form you prefer, and cost. This page compares them factually; it does not make health claims.
Key takeaways
- All three are NAD+ precursors — they sit at different points on the same salvage pathway.
- NR converts to NMN and then to NAD+; NMN is one step closer; NMNH is a reduced form of NMN.
- NR has the longest human trial record; NMN is the most researched in the longevity context; NMNH is newest and least studied in humans.
- Typical market doses: NR ~250–500 mg, NMN ~250–1,000 mg, NMNH ~500 mg.
- For deep pairwise detail see our NMN vs NR and NMN vs NMNH guides.
- All three are sold as UK food supplements with no authorised health claims.
The contenders
The three NAD+ precursors
NAD+ is a coenzyme found in every cell. The body makes it partly from vitamin B3 forms through what is called the salvage pathway. NR, NMN and NMNH are three molecules that feed into that pathway at slightly different points, which is the main reason they are compared.
NR — nicotinamide riboside
The most established. The smallest of the three molecules. In the salvage pathway it is first converted to NMN, then to NAD+. It has the longest record of published human trials and was one of the earliest NAD+ precursors to reach the consumer market.
NMN — nicotinamide mononucleotide
The most discussed. One step closer to NAD+ than NR — it is the direct product of NR plus a phosphate group. NMN is the precursor most associated with longevity research and is the most widely sold of the three in the UK.
NMNH — reduced NMN
The newest. The reduced (dihydrogenated) form of NMN, also written dihydro-NMN. It is the most recent to appear as a supplement; laboratory and animal research has measured how it raises NAD+, but human data remains very limited.
One shared pathway
Why they are compared. All three end at the same molecule, NAD+. They differ in structure, in how many conversion steps they take, in how much human research exists, and in price.
Side by side
How NMN, NR & NMNH differ
The table below sets the three precursors against each other on the points shoppers most often weigh up. Doses shown are typical of what appears on the UK market — they are not recommendations, and there is no official RDA for any of these compounds.
| Factor | NR | NMN | NMNH |
|---|---|---|---|
| Full name | Nicotinamide riboside | Nicotinamide mononucleotide | Reduced (dihydro) nicotinamide mononucleotide |
| Molecule type | Nucleoside (riboside form of vitamin B3) | Nucleotide (NR plus a phosphate group) | Reduced form of the NMN nucleotide |
| Conversion to NAD+ | Converts to NMN, then to NAD+ | One step from NAD+ (via NMNAT enzymes) | A reduced form studied for how it feeds into NAD+ |
| Human evidence maturity | Longest human trial record of the three | Growing body of human studies; most discussed in longevity | Newest — mostly laboratory and animal research so far |
| Typical market dose | ~250–500 mg/day | ~250–1,000 mg/day | ~500 mg/day |
| Relative cost per dose | Moderate; widely available | Moderate; the most common on shelves | Typically the priciest — newer, more complex to produce |
| Stability note | Generally stable in capsule form | Stable; commonly capsules or powder | Reduced forms can be more sensitive to air and moisture |
For the head-to-head detail behind two of these columns, our dedicated pages go deeper: NMN vs NR covers the two most established precursors, and NMN vs NMNH looks at the standard versus the reduced form.
Same destination, different starting points — and very different amounts of human research.
Making the call
Which is right for you
Because all three are food supplements without authorised health claims, the sensible way to choose is on the factual differences rather than on promised outcomes:
- If you want the longest human track record — NR has been studied in people for the longest and is a familiar, well-characterised option.
- If you want the most-discussed longevity precursor — NMN is one step closer to NAD+ and is the most widely researched and stocked of the three.
- If you specifically want the newest reduced form — NMNH is the most recent arrival; it is the least studied in humans and usually the most expensive.
- Whichever you pick — buy on verified purity and third-party testing, not on marketing superlatives, and introduce one product at a time.
Many people researching these compounds also look across the wider longevity supplements category. New to the basics? Start with what is NMN? before comparing precursors.
Common questions
NMN vs NR vs NMNH FAQ
They are three related molecules that act as precursors to NAD+. NR is a nicotinamide riboside; NMN is NR with an added phosphate group, one step closer to NAD+; and NMNH is the reduced (dihydro) form of NMN. They differ in structure, the number of conversion steps, how much human research exists, and cost.
NR has the longest record of published human trials, while NMN is the most widely discussed in the longevity research field. NMNH is the newest and, to date, has mostly laboratory and animal research rather than human studies. Research studying a compound is not the same as an authorised health claim.
Neither is "better" in any claim sense. NMNH is the reduced form of NMN and is newer to the market, with far less human data behind it. Our NMN vs NMNH guide compares the two forms in detail on structure, evidence and typical dose.
Typical amounts on the UK market are around 250–500 mg for NR, 250–1,000 mg for NMN and about 500 mg for NMNH. These reflect what products offer, not a recommended dose — there is no official RDA for any of them. Consult a healthcare professional before starting a new supplement.
Some people combine NAD+ precursors, but there is no established protocol and stacking three at once is uncommon. As a general principle, introduce one product at a time so you can keep track of what you are taking, and speak to a healthcare professional first — particularly if you take medication or manage a health condition.
These compounds are sold in the UK as food supplements. Regulatory status for novel NAD+ precursors can evolve, so reputable suppliers keep their sourcing and compliance up to date. None of them carry authorised health claims, and this page describes them factually rather than making any.
Explore NAD+ precursors
Our NMN is paired with trans-resveratrol at 1,100 mg per serving, and we also stock a next-generation NMNH — both UK-manufactured and independently batch tested, with a Certificate of Analysis available on request.
Continue reading
About the author. This guide was written and reviewed by the Vitality Supplements Editorial Team, a UK supplement manufacturer. Every batch we produce is independently tested by an ISO/IEC 17025-accredited laboratory, with a Certificate of Analysis available on request.
This article is for general information about food supplements and is not medical advice. NMN, NR and NMNH are sold as food supplements in the UK and carry no authorised health claims. Always consult a qualified healthcare professional before starting any supplement, particularly if you are under 18, pregnant, breastfeeding, taking medication or managing a health condition. References available on our research references page.
