At-home NAD⁺ · Made in the UK
The DIYNAD⁺ pen: pharmaceutical-grade NAD⁺, pre-measured into a pen you use at home. Every other day, a few seconds, nothing to draw up.
Choose your strength
The starting strength
Designed for everyday maintenance and first-time users. Reliable support without stepping up to high strength.
£140
Free UK delivery · next-day by 4pm
The higher strength
Same pen, same every-other-day schedule — a more concentrated dose for those ready to step up.
£188
Free UK delivery · next-day by 4pm
Sold and shipped by FillerFace, an approved DIYNAD⁺ stockist. You'll complete your order securely on fillerface.co.uk.
How it works
Doses are measured at the factory, not by you at the kitchen table. Nothing to draw up or calculate.
One dose every other day, just under the skin. The whole thing is over in a few seconds.
Each pen is sized for a 28-day plan on the standard schedule. Keep it in the fridge.
Why a pen
Taken by mouth, NAD⁺ is broken down in the digestive system before it reaches the bloodstream. The pen places it just under the skin instead — so the gut never gets the chance.
NAD⁺ is a coenzyme found in every cell and involved in cellular energy production. Levels naturally decline with age; the pen helps you keep your intake consistent, without waiting rooms or appointments.
What's inside
Nothing else.
FAQs
Every other day, as directed. The doses are pre-measured, so there is nothing to draw up or calculate.
One pen is sized for a 28-day plan on the standard schedule.
The 750mg is designed for everyday maintenance, for first-time users, and for anyone who wants reliable support without stepping up to high strength.
The 1000mg is the higher-strength option — same pen, same schedule. Most people start on the 750mg.
Two things: pharmaceutical-grade NAD⁺, and the water for injection it is dissolved in. No buffers, no preservatives, no stabilisers.
Stability comes from how it is manufactured rather than from anything added to it.
It is a subcutaneous injection — into the fat layer just under the skin, not into muscle or a vein — using a short, fine needle.
The injection is over in a few seconds. Sensation varies from person to person; if one site feels sore, use a different one next time.
The most common are at the injection site: brief redness, mild swelling or tenderness, which usually settles by itself. Rotating where you inject helps.
If you experience any adverse reaction or discomfort, stop using it and consult your healthcare provider.
Do not use it if you are pregnant or breastfeeding, or if you are under 18.
Speak to your GP or pharmacist first if you take prescription medication, have a diagnosed medical condition, or have reacted badly to an injectable before.
Shipped from UK stock by FillerFace. Order by 4pm for next-day delivery — free on orders over £100, which both pens qualify for. Buy Now Pay Later is available at checkout.
In UK stock with FillerFace. Order by 4pm for next-day delivery.
