NMN for longevity

At a Glance

Mechanism of Action

Phosphorylated nicotinamide ribose converted intracellularly to NAD+ via NMNAT enzymes; supports CD38, SIRT1/3, and PARP-dependent pathways.

NMN is typically taken orally as sublingual powder or enteric capsule, morning, before training. Phosphorylated nicotinamide ribose converted intracellularly to NAD+ via NMNAT enzymes; supports CD38, SIRT1/3, and PARP-dependent pathways. Effective range is 125 mg – 1,000 mg, with 250–500 mg AM being the most-studied dose. It does not require food, and fasted dosing is often preferred for absorption or timing reasons.

Dosage & Timing

Morning or pre-training dosing aligns NMN with circadian cortisol rise and training demand. This maximises subjective energy effects and avoids sleep interference.

How to Take

1. Start at the lower end of the range (125 mg ) for the first 7–10 days to gauge tolerance.
2. Titrate up to the target dose of 250–500 mg AM once tolerance is confirmed.
3. Fasted or with a light snack is acceptable — food is not required.
4. Best timing: Morning, before training. Keep the daily window consistent so effects are legible against baseline.
5. Missed dose: skip and resume normally; never double up.

Absorption & Bioavailability

• Sublingual delivery is marketed heavily but has weak human evidence over oral for NAD+ elevation.

Cycling & Stacking Strategy

• Most users run NMN continuously and reassess every 12 weeks with bloods and a symptom log.
• If effect plateaus, a 2–4 week wash-out often restores responsiveness by resetting receptor sensitivity and feedback loops.
• Common stack: TMG (trimethylglycine), Resveratrol, Pterostilbene. Introduce one addition at a time so you can attribute effect and side effect.
• Rotate related supplements seasonally rather than layering five products in the same category.

Who This Is For

What to Monitor

Reported Benefits

• Restored NAD+ in aged tissues
• Improved insulin sensitivity in postmenopausal women
• Aerobic capacity improvements (small RCTs)

Safety Profile

How to Choose a Quality Product

• Third-party tested — look for NSF, Informed Sport, USP or an equivalent independent COA (certificate of analysis) on the batch you're buying.
• Standardised active — the label should specify the exact active compound and its concentration, not just the botanical name.
• Minimal excipients — avoid unnecessary fillers, artificial colours and shared allergens (soy, gluten) unless you're happy to test for reactions.
• Dose per serving matches the researched range (125 mg – 1,000 mg) — many consumer products under-dose to widen margins.
• Manufactured in a cGMP-certified facility with a clear country of origin.
• Reasonable price per effective dose — cheaper products often deliver less active per capsule, so the true cost-per-dose is higher.

Common Mistakes

• Under-dosing — using 125 mg when the research uses 250–500 mg AM.
• Stopping after two weeks — most longevity-relevant endpoints need 8–12 weeks of consistent dosing before they move on bloods.
• No baseline labs, so any effect is attributed to placebo or hype rather than to the supplement.
• Stacking three or four new products in the same month — you lose all ability to attribute results.
• Buying the cheapest brand and skipping the third-party COA — potency and purity vary dramatically between manufacturers.
• Timing it inconsistently — the biological effect depends on steady exposure, not sporadic doses.

Evidence Grade — A (87/100)

Grade A — multiple randomised human trials or meta-analyses support the primary claim. Dosing, mechanism and safety are well characterised in humans.

The primary references used to grade NMN are listed below. Cross-check against the current literature and expect the grade to move as new human trials publish.

References

1. [1]NMN supplementation increases NAD+ in healthy adults — Endocrine Journal, 2022

Further reading: Research library → · Protocols →