NMN Capsules UK — 500mg high-quality β-NMN, independently tested for purity

NMN capsules are the most convenient and most commonly used form of NMN supplementation in the UK. Unlike sublingual powders or liquid formats, capsules are pre-dosed, portable, easy to incorporate into a daily routine, and tasteless. Here's what to look for — and why our capsule formula is designed the way it is.

Capsule vs Sublingual Powder: Which is Better?

Some NMN products are marketed as sublingual powders, with claims of superior absorption. The reasoning: if NMN is placed under the tongue, it can bypass digestive enzymes and enter the bloodstream directly. Andrew Huberman takes NMN this way.

The practical counterargument: the discovery of the Slc12a8 transporter in 2019 showed that NMN can be absorbed directly in the small intestine, bypassing conversion to NR first. Good quality NMN capsules with absorption enhancers — like Black Pepper Extract (piperine) — achieve effective bioavailability without the practicality challenges of sublingual administration.

For most people, capsules are the right choice. They're consistent, convenient, and when properly formulated, highly effective.

What Makes a Good NMN Capsule?

The NMN itself: Should be β-NMN specifically (the biologically active isomer) at high purity. The capsule content should be a fine white powder.

The capsule shell: Ideally HPMC (hydroxypropyl methylcellulose) — a plant-derived vegetarian/vegan capsule rather than gelatin.

Absorption enhancers: Black Pepper Extract (standardised to 95% piperine) improves the bioavailability of many active compounds including NMN.

No fillers: Avoid products listing magnesium stearate, silicon dioxide, talc, or other anti-caking agents as prominent ingredients — these dilute the active content.

Little Ox NMN Capsules

All Little Ox NMN products are Independently tested for purity and contaminants. You can view our Certificates of Analysis and manufacturing certifications — including GMP (Intertek), ISO 22000, HACCP — on our quality assurance page.

Looking to stock Little Ox in your pharmacy, health store or clinic? We supply NMN supplements wholesale to UK retailers. Learn about wholesale enquiries →

NMN Pure — 500mg β-NMN + Black Pepper Extract per capsule. 60 capsules per pack (2-month supply at 1 capsule daily). HPMC vegetarian capsule. No fillers. Third-party tested. From £7.99.

NMN Plus — 500mg β-NMN + Trans-Resveratrol + Black Pepper Extract. 60 capsules per pack. The combination used by David Sinclair and referenced by Andrew Huberman. From £9.99.

How to Take NMN Capsules

Take one capsule in the morning, 30–60 minutes before your first meal. Morning dosing aligns with your body's natural NAD+ production rhythms. At 500mg per capsule, one capsule daily is the standard maintenance dose supported by clinical evidence. Those over 50 may consider two capsules daily (1,000mg).

Free Delivery on UK Orders over £35.00. Shop NMN Capsules from £7.99 →

Wondering how Little Ox compares to other UK NMN brands on price and quality? We've put together a full comparison of Little Ox vs Charava, DoNotAge and Longevity Formulas — including current prices, purity specs and what you're actually paying for.

Manufactured in HACCP and GMP certified facilities for Little Ox Ltd, Suite 3.05, Jactin House, 24 Hood Street, Manchester M4 6WX