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NMN 500mg vs 1000mg: Which Dose Is Right?
NMN 500mg vs 1000mg
A clear head-to-head on the two most common NMN dose tiers — 500mg and 1000mg. Who each one tends to suit, how they compare on cost per day, what daily amounts human research has actually used, and a sensible way to step up. Practical, no-hype, and honest about what the evidence does and doesn't say.
Last updated July 2026 · Written by Vitality Supplements Editorial Team · ~2,300 words · 9 min read
Food supplement information — not medical advice
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Evidence-referenced
Quick answer
NMN 500mg or 1000mg — which is right?
Both are common daily NMN tiers. 500 mg is the popular starting point — lower cost, easy to trial, and in the range several studies used. 1000 mg (1 g) is the higher tier that matches the dose in some of the larger human trials that measured a bigger rise in blood NAD+. There is no official recommended amount for NMN, and human research has studied a wide dose range (roughly 250 mg to about 900 mg-1 g per day). A common, sensible approach is to start at 500 mg and, if you choose, step up to 1000 mg. NMN is a UK food supplement with no authorised health claims. For the full picture, see our NMN dosage guide.
Key takeaways
- 500mg and 1000mg are the two most common NMN dose tiers on the market.
- Human research has used a wide range, roughly 250 mg to about 900 mg-1 g per day.
- Some larger trials at 1 g/day measured a bigger rise in blood NAD+ than lower doses.
- 500mg suits those starting out or on a tighter budget; 1000mg suits those wanting the higher studied tier.
- A sensible approach is to start at 500mg and step up if you choose.
- There is no official RDA for NMN; it is a UK food supplement with no authorised health claims.
The two tiers
500mg vs 1000mg, side by side
The choice between 500 mg and 1000 mg of NMN is mostly about where you are starting from, your budget, and how closely you want to match the higher-dose end of the research. Neither is inherently "correct" — there is no established optimal dose for NMN in humans, and it is sold as a food supplement, not a medicine.
500 mg is the natural entry point. It sits within the range used in several published trials, costs less per day, and lets you trial NMN before committing to a higher tier. 1000 mg is the higher tier that matches the daily amount used in some of the larger human trials — including a 2023 study that measured a roughly +38% rise in blood NAD+ over 12 weeks at 1 g/day. Remember that a bigger measured rise in a blood marker is a research finding, not a promise about how you will feel.
Start where the research overlaps your budget — then decide whether to step up.
500mg
Entry tierPopular starting dose; within the research range.
1000mg
Higher tierMatches some larger trials at 1 g/day.
250-900mg
Studied rangeThe span of daily doses used in human research.
No RDA
No official doseThere is no established recommended amount for NMN.
At a glance
The comparison table
A direct comparison of the two tiers across the factors people actually weigh up. Cost is illustrative and relative, not a specific price.
| Factor | NMN 500mg / day | NMN 1000mg / day |
|---|---|---|
| Who it tends to suit | Newcomers, those trialling NMN, tighter budgets, or people who prefer a lower starting amount. | Those already comfortable with NMN who want the higher studied tier, or who prefer to match 1 g/day research. |
| Cost per day | Lower — the more economical way to start. | Higher — roughly double the material per day. |
| What research used | Within the studied range; several trials used 250-500 mg. | Matches larger trials at ~900 mg-1 g that measured bigger NAD+ rises. |
| Blood NAD+ (as measured in trials) | Trials at lower doses reported smaller measured increases. | Trials at higher doses reported larger measured increases (a dose-related pattern). |
| Ease of stepping up | Easy to move to 1000mg later, e.g. by doubling capsules. | Already at the higher common tier. |
| Tolerability (in trials) | Reported well tolerated at the doses studied. | Also reported well tolerated up to about 1 g/day in trials. |
"What research used" and "blood NAD+" columns summarise what published human trials measured and reported, not promises of any effect. See our NMN clinical trials summary and research references.
The evidence
What daily amounts research used
Understanding the dose tiers is easier once you know that human NMN research has covered a wide range rather than settling on one number. Published trials have used daily amounts from about 250 mg up to roughly 900 mg-1 g. A recurring pattern in that work is that higher doses tended to raise blood NAD+ more — a dose-related measurement, not a statement about benefits.
Lower end (250-500mg)
Used in several trials. Studies at 250-500 mg measured increases in NAD+ metabolism and ran safety and physical measures. This is the range the 500mg tier sits in.
Higher end (600-900mg-1g)
Used in larger trials. A 2023 dose-ranging trial at 300/600/900 mg and a 12-week 1 g/day trial reported larger, dose-related rises in blood NAD+. This is where the 1000mg tier sits.
No single "best" number
Still being studied. There is no official RDA or established optimal dose for NMN in humans. The range reflects ongoing research, not a settled answer.
A measurement, not a promise
Keep it in perspective. A higher measured NAD+ level shows absorption and conversion — it is not the same as a health outcome, and NMN carries no authorised health claims.
For the full breakdown of individual studies — who took part, for how long and what was measured — see our NMN human clinical trials summary. For the deeper, general dosing discussion, the NMN dosage guide is the resource to read next; this page is deliberately just the 500-vs-1000 comparison.
A sensible approach
How to step up safely
Many people find the simplest approach is to begin at 500 mg and give it a consistent run before deciding whether to move to 1000 mg. Because NMN is typically sold in 500 mg and 1000 mg capsules, stepping up can be as simple as taking two 500 mg capsules or switching to a 1000 mg product. There is no need to rush the higher tier.
- Start at 500mg daily — a common, economical entry point within the research range.
- Be consistent — take it daily; research measured changes over weeks, not days.
- Step up if you choose — move to 1000mg to match the higher studied tier, e.g. by doubling capsules.
- Don't exceed what research studied without professional advice — trials generally stayed at or below about 1 g/day.
- Buy verified NMN — the dose only matters if the product genuinely contains it; see our genuine NMN guide.
- Ask a professional — especially if you take medication or manage a health condition.
Whichever tier you land on, consistency and product quality matter more than chasing the biggest number. If you are weighing up formats as well as dose — capsules, powder or liposomal drops — our format comparison covers that side of the decision.
Common questions
Dose comparison FAQ
Not necessarily "better" — they are different tiers. In trials, higher doses tended to raise blood NAD+ more, which is a dose-related measurement, not a promise of a bigger benefit. 500mg is a common, economical starting point within the research range; 1000mg matches the higher tier used in some larger trials. There is no official optimal dose for NMN.
A common, sensible approach is to start at 500 mg daily — it sits within the studied range, costs less, and lets you trial NMN before deciding whether to step up to 1000 mg. This is general information, not personalised advice; consult a healthcare professional about your own situation. See the deeper NMN dosage guide for more.
Human trials have used a wide range, roughly 250 mg to about 900 mg-1 g per day. Some of the larger trials at around 1 g/day reported bigger, dose-related rises in blood NAD+. Full details are in our clinical trials summary.
Because NMN is sold in 500 mg and 1000 mg formats, you can move up simply by taking two 500 mg capsules or switching to a 1000 mg product. Many people run 500 mg consistently first, then step up if they choose. There is no need to exceed the roughly 1 g/day used in trials without professional advice.
No. While higher doses raised blood NAD+ more in trials, that is a measurement rather than a guaranteed benefit, and most research stayed at or below about 1 g/day. Taking more than the studied range is not supported by the evidence and should only be considered with professional guidance. Quality and consistency matter more than chasing a big number.
No — a stated dose only means something if the product actually contains that much real NMN. Some products sold as NMN are under-dosed or mislabelled. Look for a stated purity, third-party HPLC testing and a Certificate of Analysis; see our guide on spotting genuine NMN.
Pick your tier
Both our NMN 500mg and Pure NMN 1000mg are UK-manufactured and independently batch tested, with a Certificate of Analysis available on request. Start at 500mg or go straight to 1000mg.
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. It describes dose tiers and what research measured, and does not make health claims. NMN is sold as a food supplement in the UK and carries 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.
