Daily cellular protocol
NAD+
500mg of NAD+ supported by Quercetin and Resveratrol, dosed once daily for cellular energy and metabolic health.
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NMN Capsules: Dose, Purity, and the Checks That Matter
The capsule is the easy part. What is inside it varies more than most buyers would believe.
This guide is part of our NAD+ supplement guides track. For continuity, read our NAD+ capsules and NAD+ supplements for energy.
The short answer
Human NMN trials have used 150–1200mg per day over four to twelve weeks, with blood NAD+ rising consistently and outcome measures moving much less consistently. The bigger practical risk is not dose selection but content: when Sandalova and colleagues assayed 18 commercial NMN products, measured content ranged from nothing detectable to slightly above claim, and three products contained no detectable NMN. Pick a dose inside the trial range, then verify the product actually contains it.
Decision brief
What matters before you buy
Published NMN trials used 150–1200mg/day across four to twelve weeks.
Independent assay of 18 commercial products found only seven within 10% of label claim.
Three of those products contained no detectable NMN at all.
A lot-specific certificate of analysis is the only meaningful purity check available to a buyer.
Muscle Velocity standard
A capsule with the number on the label
500mg of NAD+ with Quercetin and Resveratrol, in a fixed daily dose. Stated amount, verifiable content, no guesswork.
Educational content only. Supplements are not a substitute for medical care. Speak with a qualified healthcare professional when a condition, medication, or persistent symptom is involved.
What dose the research supports
There is no established optimal NMN dose. The 2024 systematic review of physical-performance trials covered ten randomized studies and 437 participants at 150–1200mg/day. A separate 2024 metabolic meta-analysis covered eight trials and 342 adults at 250–2000mg/day.
Across both, the consistent finding is that NAD+ rises. The metabolic review found NAD+ increased in five of eight trials while fasting glucose, insulin, HbA1c, lipids, BMI, and blood pressure showed no significant change. The performance review described strength and aerobic improvements as nonsignificant.
The practical reading is that landing somewhere inside the studied range matters more than optimising within it, because the outcome data is not precise enough to support fine-tuning.
What independent testing found inside the bottles
Sandalova and colleagues, publishing in GeroScience in 2024, bought 18 commercial NMN products and analysed them by HPLC-QqQ-MS with five aliquots per sample. This is the study worth knowing about before you spend anything in this category.
Measured NMN content ranged from non-detectable up to 11.2% above the adjusted label claim. Only seven of the 18 fell within 10% of what the label said. Three contained no detectable NMN whatsoever.
That is not a rounding-error problem. It means a meaningful share of the market is selling something other than what is printed on the bottle, and no amount of reasoning about dose protects you from buying one of them.
- Studied dose range: 150–1200mg/day for performance trials, 250–2000mg/day for metabolic
- Consistent across trials: circulating NAD+ increases
- Inconsistent: glucose, lipids, strength, body composition
- Documented: 3 of 18 assayed commercial products had no detectable NMN
The buying sequence that survives this
Ask for a certificate of analysis tied to your lot number, not a generic PDF from the brand's ingredient supplier. Those two documents look similar and mean very different things.
Prefer products that publish testing routinely rather than on request. A company that treats verification as standard practice is making a different bet on its own supply chain than one that treats it as a customer-service escalation.
Then run the protocol properly: a consistent dose inside the studied range, taken daily, for the eight to twelve weeks the trials ran. Anything shorter tells you nothing regardless of what is in the capsule.
Buying checklist
How to choose without getting sold
A lot-specific certificate of analysis
Not a supplier document for the raw ingredient. The test needs to match the bottle in your hand.
A dose inside the trial range
150–1200mg/day covers the published performance trials. Precision beyond that is not supported by the outcome data.
Routine published testing
Brands that publish results as standard are making a stronger claim about their supply chain than brands that supply them on request.
Capsule count that matches the daily dose
Check how many capsules a studied dose actually requires. Cost per gram often looks very different afterwards.
Fit check
Who this path is—and is not—for
Good fit
- Buyers choosing between NMN capsule products on something other than price
- Readers who want the purity data before the dosing advice
- Anyone who assumed label accuracy was a solved problem in this category
Poor fit
- Readers looking for a precise optimal dose; the outcome evidence does not support one
- Anyone expecting capsules alone to deliver a felt effect within days
- People seeking guidance for a diagnosed metabolic condition
Common questions
The questions worth answering
How many mg of NMN should I take?
Published trials used 150–1200mg/day for physical performance and 250–2000mg/day for metabolic outcomes. No optimal dose has been established, so landing inside the studied range and staying consistent matters more than fine-tuning the number.
How do I know my NMN capsules are pure?
Ask for a certificate of analysis matched to your lot. A 2024 GeroScience analysis of 18 commercial NMN products found only seven within 10% of label claim, and three with no detectable NMN. Supplier documents for raw ingredients are not the same as testing your bottle.
How long before NMN capsules do anything?
Blood NAD+ rises within weeks, but the trials that measured outcomes ran four to twelve weeks. Judge a protocol at eight weeks on a consistent daily dose, and be aware that several reviews found outcome improvements that did not reach statistical significance.
Are NMN capsules better than powder?
Capsules deliver a fixed dose without measurement error, which makes a personal trial easier to interpret. Powder can be cheaper per gram but reintroduces weighing. No trial evidence favours either on effectiveness.
Evidence desk
Read the sources, not just the summary
Sandalova et al., GeroScience (2024) — measured NMN content versus label claimLaboratory analysis of 18 commercial NMN products. Content ranged from none detectable to 11.2% above the stated claim, with only seven landing within 10% of label.Systematic review of NMN randomized controlled trials and physical performance (2024)Ten randomized controlled trials, 437 participants, 150–1200mg/day across 4–12 weeks. Reports where performance measures moved and where they did not.Current Diabetes Reports (2024) — NMN and glucose and lipid metabolism meta-analysisEight randomized controlled trials, 342 adults, 250–2000mg/day. Blood NAD+ rose in five trials while glucose, insulin, HbA1c, lipids, BMI, and blood pressure did not shift.
Continue the NAD+ guide
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