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The most searched question in the NMN category — answered accurately, with reference to what published human research has actually used. Not marketing. Not guesswork.
Dosage guide. Not medical advice. Consult a healthcare professional before starting.Published human research has used 250mg to 900mg per day. A 2023 systematic review of 10 RCTs with 437 participants confirmed consistent NAD+ elevation and a strong safety profile across this entire range. NMN has no established RDA under UK food supplement regulations. Consult a qualified healthcare professional before starting.
The most important thing to understand about NMN dosage is that there is no established RDA for NMN under UK food supplement regulations. Published research has studied a range of doses and found NAD+ elevation across all of them.
A 2023 systematic review of 10 RCTs encompassing 437 participants documented consistent blood NAD+ elevation at doses from 250mg to 900mg per day, with a strong safety profile across all studies. This is the highest quality level of published evidence currently available for NMN. View our full research references →
| Study | Year | Dose | Duration | Key Finding |
|---|---|---|---|---|
| Yoshino et al. (Science) | 2021 | 250mg/day Most studied | 10 weeks | Elevated blood NAD+, improved insulin sensitivity markers |
| Igarashi et al. (NPJ Aging) | 2022 | 250mg/day | 12 weeks | Significant blood NAD+ elevation vs placebo |
| Liao et al. (GeroScience) | 2021 | 300mg/day | 60 days | NAD+ elevation, physical performance markers explored |
| Okabe et al. (NPJ Aging) | 2022 | 250mg/day | 12 weeks | NAD+ elevation, muscle function markers in older adults |
| Yi et al. systematic review | 2023 | 250–900mg/day Full range | 4–24 weeks | Consistent NAD+ elevation across all doses, strong safety profile — 10 RCTs, 437 participants |
| Safety study (single dose) | 2020 | Up to 1250mg Single dose only | Single dose | No serious adverse events at any dose tested |
Published research has confirmed NAD+ elevation at doses from 250mg to 900mg per day — with no significant adverse events across all studies reviewed.
What does this mean in practice? The published evidence suggests 250–500mg per day is a well-studied starting range, with consistent effects documented. Higher doses up to 900mg have been studied without significant adverse events — but whether higher doses produce meaningfully greater effects is not definitively established in the published literature.
Important: This describes what published research has used as doses for NMN as a compound. This is not a dosage recommendation for any specific person. Consult a qualified healthcare professional before starting NMN or any food supplement.
The published research does not establish a specific starter dose protocol. A sensible approach based on published evidence is to begin at a well-studied dose and maintain consistency rather than starting very high or frequently changing dose.
250mg–500mg per day is within the most commonly studied range in published human trials. This is a reasonable starting point. The published research does not establish that a gradual ramp-up is necessary from a safety perspective — but some people prefer to start lower and assess individual response.
Timing is one of the most commonly asked questions about NMN supplementation. The honest answer: published research has not established a definitively optimal time. Studies have used various administration times. However, there are research-based reasons why morning is the most commonly used timing.
NAD+ plays a role in circadian rhythm regulation — some researchers suggest morning timing aligns with natural NAD+ production patterns. See our NAD+ guide for more on how NAD+ functions in the body.
Published human research on NMN has used both fasted and fed administration without establishing a clear superiority for either. Some researchers have suggested that taking NMN with a small amount of fat may support absorption — NMN is partly lipophilic — but this has not been definitively confirmed in published human pharmacokinetic research.
The practical answer: Follow the guidance on your product label. If you experience digestive discomfort taking NMN on an empty stomach, take it with food. Either approach is consistent with what published research has used.
What to avoid: Avoid taking NMN alongside large amounts of alcohol — alcohol disrupts NAD+ metabolism and sirtuin activity. If on any medication, consult your GP before starting NMN. See also: Sirtuins and gene regulation →
The single most important factor is not timing or food — it is purity and consistency.
Every Vitality Supplements NMN product provides a dose within the range studied in published human research. All products are >99% β-NMN purity, UK manufactured and independently tested by an ISO/IEC 17025-accredited laboratory on every production batch. CoA available on request.
500mg NMN combined with 600mg Trans-Resveratrol at 98% trans-isomer purity. The classic NAD+ and sirtuin-pathway combination at the most commonly studied NMN dose. The starting point for most people new to NMN supplementation.
750mg NMN alongside TMG (methyl donor), pterostilbene (higher-bioavailability sirtuin polyphenol) and apigenin (CD38 pathway). The most comprehensive formula — for those who want the higher studied NMN dose alongside complementary longevity ingredients.
>99% β-NMN purity · ISO/IEC 17025 tested every batch · UK manufactured · CoA on request · 4.8★ / 2,400+ customers
