How Much NMN Should I Take? The Australian Dosage Guide

Dosage Guide · Updated June 2026

"How much NMN should I take?" is the most common question from first-time NMN buyers — and many brands answer it vaguely to avoid committing to a position that might exclude their under-dosed product. This guide gives you the specific, evidence-based answer.

What the Clinical Trials Actually Used

Here is the honest summary of NMN doses used in published human clinical trials, and what each found:

250mg vs 500mg: What the Evidence Shows

250mg produces real effects. The Yoshino, Igarashi, and Kimura trials all used 250mg daily and found measurable NAD+ increases and functional improvements. This dose is clinically meaningful — and it is what many Australian supplements (including Chemist Warehouse's NMN) provide.

500mg produces stronger effects. A dose-response analysis of available data shows that NAD+ elevation roughly doubles from 250mg to 500mg, with minimal additional benefit from further increases. The safety trial confirmed 500mg is well-tolerated with no adverse effects. This is why Nadovia uses 500mg as the standard dose — it sits at the top of the evidence-supported range without the methylation management complexity that comes with higher doses.

Our recommendation: 500mg. It is the dose with the strongest overall evidence, the most pronounced NAD+ elevation, and the most practical compliance profile. One capsule of Nadovia Pure NMN 500mg or one daily dose of the Longevity Complex.

1000mg and Above: Is More Better?

Higher doses — 600mg–1000mg — do produce higher NAD+ levels. David Sinclair publicly takes 1g daily. However, several considerations apply at these doses:

• Diminishing returns: The NAD+ increase from 500mg to 1000mg is smaller than from 250mg to 500mg. Beyond 500mg, you are in the zone of optimisation, not establishment.
• Methylation pressure: At 1g NMN daily, the methyl group consumption is substantial. TMG at 600–1200mg daily becomes important rather than just advisable.
• Cost: Doubling the dose doubles the cost. For most Australians, 500mg offers the best efficacy-to-cost ratio.
• Who 1g makes sense for: Those who have been on 500mg for 8+ weeks and want to explore higher dosing, or those following a Sinclair-inspired protocol closely.

Why TMG Dose Must Scale with NMN Dose

This is the dosage consideration most guides ignore. Every NMN-to-NAD+ conversion consumes a methyl group from your body's reserves. At 500mg/day NMN, this methyl consumption is significant — and without Trimethylglycine (TMG) to replenish it, long-term NMN use can deplete methylation capacity.

• At 250mg NMN daily: TMG advisable (300mg is sufficient)
• At 500mg NMN daily: TMG recommended (600mg — what Nadovia's Longevity Complex includes)
• At 1000mg NMN daily: TMG essential (800mg–1.2g)

If you are taking plain NMN without TMG, add it. Nadovia's Longevity Complex includes 600mg TMG per serving — appropriately matched to the 500mg NMN dose.

When to Take NMN

Morning, with your first meal. NAD+ has a circadian rhythm — it oscillates through the day and is naturally higher in the first half. Taking NMN in the morning aligns supplementation with this rhythm. Food is optional (the delayed-release capsule in Nadovia's products handles acid-sensitivity regardless), but taking it with breakfast typically improves consistency and is associated with better tolerance in those with sensitive stomachs.

Do not take NMN in the evening. NAD+ supports mitochondrial activity and cellular energy production. Taking NMN late in the day may — for some people — interfere with the natural downregulation of cellular activity that supports sleep onset. Morning dosing avoids this.

FAQ

How much NMN should I take per day?

500mg of pharmaceutical-grade beta-NMN daily is the evidence-based recommendation for most adults. This is the top of the clinical trial dose range (250–600mg) with the strongest overall evidence for NAD+ elevation. Human safety trials found no adverse effects at doses up to 1200mg/day.

Is 250mg of NMN enough?

Yes, 250mg produces real NAD+ elevation — confirmed in multiple human trials. But 500mg consistently produces stronger and more reliable effects. Chemist Warehouse's 250mg products are real NMN (assuming they contain what they claim) but below the optimal dose for most research-based protocols.

Should I take 500mg or 1000mg?

Start at 500mg and evaluate your response after 8–12 weeks. If you want to explore higher dosing, 1000mg (with 800–1200mg TMG daily) is a reasonable step. Most people find 500mg the right balance of efficacy, methylation manageability, and cost.

When is the best time to take NMN?

Morning with your first meal. NAD+ follows a circadian rhythm, naturally higher in the first half of the day. Morning dosing aligns with this rhythm. Avoid evening dosing — it may interfere with sleep onset for some people.

References: Yoshino M et al., Cell Metabolism (2021); Igarashi M et al., NPJ Aging (2022); Liao B et al., Nature Aging (2021); Irie J et al., Endocrine Journal (2020) — NMN safety dose escalation trial. Not medical advice.