What is NMN?
NMN (Nicotinamide Mononucleotide) is a naturally occurring molecule found in trace amounts in foods like broccoli, edamame and avocado. In the human body, NMN is a direct biosynthetic precursor of NAD+ (Nicotinamide Adenine Dinucleotide) — a coenzyme present in every living cell that is essential for energy metabolism, DNA repair and the activity of sirtuins (a family of longevity-associated enzymes).
Research from the Sinclair Lab at Harvard Medical School and other institutions has shown that NAD+ levels decline by approximately 50% between the ages of 40 and 60 [1]. This decline is associated with reduced mitochondrial function, slower DNA repair and many of the cellular hallmarks of ageing.
NMN supplementation is one of the most direct and best-studied ways to restore intracellular NAD+ in adults. The body converts NMN into NAD+ via a well-characterised enzymatic pathway involving NMNAT enzymes [2].
Why delayed-release matters
NMN is sensitive to stomach acid. Many off-the-shelf NMN products use standard immediate-release capsules, which means a significant portion of the active molecule is degraded before it reaches the small intestine.
ZENOA NMN uses an HPMC (hydroxypropyl methylcellulose) delayed-release capsule. The shell is engineered to remain intact through gastric pH and dissolve only once it reaches the small intestine, where NMN can be absorbed via the Slc12a8 transporter and other pathways.
What the research shows
Three of the most cited human and translational studies on NMN supplementation:
- Yoshino et al., 2018 — comprehensive review of NMN and NR mechanisms, dose-response and therapeutic potential, published in Cell Metabolism. Establishes NMN as a viable NAD+ booster in mammals [1].
- Igarashi et al., 2022 — randomised, double-blind, placebo-controlled trial in healthy older adult men showing chronic 250mg/day NMN supplementation significantly elevated blood NAD+ levels over 12 weeks (NPJ Aging) [3].
- Shade, 2020 — review of NMN bioavailability and the case for delayed-release formulation strategies (Integrative Medicine) [2].
NMN research is one of the fastest-moving fields in longevity science. New trials and observational studies are published regularly. We update the science section of the ZENOA homepage as significant new evidence emerges.
How ZENOA NMN compares
| Spec | Typical UK NMN | ZENOA NMN 500mg |
|---|---|---|
| Dose per capsule | 125–250mg | 500mg |
| Capsule type | Immediate release | Delayed-release HPMC |
| Ingredient list | 5–8 (with bulking agents) | 2 (NMN + capsule shell) |
| Manufactured in | Often unspecified | United Kingdom |
| Standard | Often unspecified | UK GMP code of practice |
| 3rd-party testing | Often unverified | Every batch |
| Vegan | Often gelatin shell | Vegan HPMC |
How to take ZENOA NMN
Adults: take one (1) capsule per day with water. It can be taken with or without food. Most users prefer mornings to align with daytime cellular energy metabolism. Do not exceed the recommended daily serving.
Stacking
NMN pairs naturally with Lion's Mane (different pathway: cognitive/NGF) for those optimising both cellular energy and cognitive performance. Many users in the longevity community also pair NMN with Resveratrol for sirtuin activation — the so-called Sinclair protocol. Resveratrol is on the ZENOA roadmap.
Storage & safety
Store in a cool, dry place out of direct sunlight, out of reach of children. Always consult your health practitioner before taking nutritional supplements, especially if you take medication or are under medical supervision. Not recommended for pregnant or breastfeeding women. Supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle.
Frequently asked questions
What dose of NMN is in each capsule?
How long does one bottle last?
When is the best time to take NMN?
Why delayed-release?
Is ZENOA NMN vegan?
Where is it manufactured?
Are there any side effects?
Can I combine NMN with other supplements?
Key References
[1] Yoshino J, et al. NAD+ Intermediates: The Biology and Therapeutic Potential of NMN and NR. Cell Metabolism, 2018;27(3):513-528.
[2] Shade C. The Science Behind NMN. Integrative Medicine (Encinitas), 2020;19(1):12-14.
[3] Igarashi M, et al. Chronic nicotinamide mononucleotide supplementation elevates blood nicotinamide adenine dinucleotide levels and alters muscle function in healthy older men. NPJ Aging, 2022;8(1):5.