The DIY NAD+ pen is a pre-loaded pen for taking NAD+ at home — no vials, no measuring, no clinic appointment. It's made in the UK, comes in two strengths, and FillerFace holds both in stock for next-day delivery from £140.
Here's what it is, how it's used, which strength to pick, and where to get it.
What is NAD+?
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every living cell. It plays a part in how cells convert food into energy and in a range of everyday cell processes. Until recently the main ways to take it were an IV drip at a clinic or a course of supplements; the pen is the at-home alternative.
NAD+ isn't a licensed medicine and isn't for treating or preventing any illness.
What is the DIY NAD+ pen?
A pen-shaped device that comes pre-loaded with NAD+ — two ingredients, NAD+ and water, nothing else — made in the UK by DIYNAD. You don't draw anything up or measure anything out: the dose is set for you, and each use takes a few seconds, just under the skin.
It comes in two strengths:
- DIY NAD+ Pen 750mg — the strength most people start on
- DIY NAD+ Pen 1000mg — the higher strength
Each pen is sized for a 28-day plan on the standard schedule.
How do you use it?
The standard schedule is one dose every other day, and each pen is sized to cover 28 days on that schedule. The pen is pre-loaded, so there's nothing to prepare: take it out of the fridge, use it, put it back. Full step-by-step instructions come in the box.
Keep it in the fridge between uses.
750mg or 1000mg?
The 750mg pen is where most people start. The 1000mg pen delivers more NAD+ over the same 28 days. Same pen, same schedule — the difference is strength and price.
| DIY NAD+ Pen 750mg | DIY NAD+ Pen 1000mg | |
|---|---|---|
| Strength per pen | 750mg | 1000mg |
| Schedule | Every other day | Every other day |
| Covers | 28 days | 28 days |
| Price | £140 | £188 |
Who shouldn't use it?
Don't use the pen if you're under 18, pregnant or breastfeeding. If you take prescription medication, have a diagnosed condition, or have reacted to a product like this before, speak to your GP or pharmacist first. Brief redness, mild swelling or tenderness at the site is the most commonly reported effect; if anything more than that happens, stop and get advice.
Where to buy the DIY NAD+ pen in the UK
FillerFace stocks both strengths in the UK and ships next day — order by 4pm. Delivery is free over £100, so both pens qualify. You can also split the cost with Buy Now Pay Later at checkout.
If you're looking at NAD+ you may also see NMN mentioned — it's a precursor the body converts into NAD+. Our own Hi,NMN range covers that side.
FAQ
Do I need a prescription for the DIY NAD+ pen?
No. It isn't a prescription medicine — you can order it directly.
How long does one pen last?
28 days on the standard schedule of one dose every other day.
Which strength should I choose?
750mg is where most people start; 1000mg is the higher strength. Same pen, same schedule.
How quickly will it arrive?
Order by 4pm for next-day delivery anywhere in the UK. Delivery is free on orders over £100.
Can I pay in instalments?
Yes — Buy Now Pay Later is available at checkout.