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The cleanest way to fuel your cells.

DIYNAD+ NAD injection pen

At-home NAD⁺ therapy

NAD⁺ Injection Pen

★★★★★ 4.8 Verified reviews

The molecule clinics charge £1,000 and up to drip into your arm, pre-measured into an auto-injector you use at home.

Pre-loaded, nothing to measure or draw Pre-measured, every other day Free UK delivery

Dosage

Free UK deliveryPause or cancel anytime

Clinicians' Choice

Pharmaceutical-grade NAD⁺, manufactured in the United Kingdom.

A clean, easy-to-use auto-injector delivering concentrated NAD⁺. Designed for everyday maintenance, first-time users, and anyone who wants reliable support without stepping up to high-strength.

NAD⁺ is a coenzyme found in every cell, involved in cellular energy production. Levels naturally decline with age.

Use every other day as directed. Doses are pre-measured, so there is nothing to draw up or calculate.

The pen is sized for a 28-day plan when following the standard schedule.

Free UK delivery, with UK-based support if you need it.

Your next pen arrives before you run out, so the every-other-day routine never breaks. Pause or cancel anytime from your account.

4.8 / 5Verified
UK supportUK-based team
Pause anytimeNo lock-in

Absorption

Most NAD⁺ is swallowed. Most of it never arrives.

The difference is not the molecule. It is the route it takes.

~30%
~99%
Oral capsuleswallowed
DIYNAD+ pensubcutaneous

Taken by mouth, NAD⁺ is broken down in the digestive system before it reaches the bloodstream. The pen places it under the skin instead, so the gut never gets the chance.

The molecule

Inside every cell, NAD⁺ powers the processes that keep you alive.

The NAD+ coenzyme molecule

Not a stimulant, not a vitamin. A coenzyme your cells cannot run without.

A human cell

Present in every cell

NAD⁺ is a coenzyme found in all your cells. It is the cofactor that lets energy and repair systems switch on when they are needed.

A mitochondrion

Carries the energy

It shuttles power from the food you eat, becoming NADH and driving ATP production inside the mitochondria.

A depleted human cell

Falls as you age

Levels decline naturally over time. The pen is there to help you keep your intake consistent, without waiting rooms or appointments.

What depends on it

Four systems that cannot run without NAD⁺.

None of this is about the pen. It is what the molecule does once it is there.

Energy

Powering the mitochondria

NAD⁺ carries the electrons that drive ATP production. Without it the chain stops.

Repair

Rebuilding damaged DNA

PARP enzymes consume NAD⁺ each time they repair a broken strand. Repair spends the pool.

Signalling

Deciding what runs when

Sirtuins use NAD⁺ as a substrate to regulate which cellular programmes are switched on.

Metabolism

Turning food into fuel

The redox reactions that break food down into usable energy require NAD⁺ at every step.

Two of those four consume the molecule outright. Which is why the pool is never static, and why it can fall.

The simplest way to picture it

Think of it as your cellular battery.

Same body, same day ahead. What changes is how much charge you start with.

A fully charged battery In your twenties

You start the day full

NAD⁺ is abundant. Every system that runs on it has as much as it needs, and you never think about it once.

A battery running low By your forties

You start the day half empty

The same battery no longer holds what it used to. You feel it in the afternoons, and you put it down to getting older.

Topping your NAD⁺ back up is how you get that charge back, and the pen is the cleanest way to do it.

Why it runs on a cycle

NAD⁺ is spent, not stored.

Your cells make it and use it continuously. The level you carry is the balance between the two, which is why the protocol is a cycle rather than a one-off.

Consumed

PARP enzymes and sirtuins do not borrow NAD⁺, they cleave it. Every DNA repair and every sirtuin reaction destroys a molecule outright.

Replaced

Cells rebuild it constantly, so what you carry at any moment is a flux, not a reservoir. There is no store to draw down.

Spent again

A dose raises the pool. It does not slow the rate at which the pool is spent, so the level drifts back down between doses.

Which is why it is sold as a plan. One pen raises the level. The plan is what holds it there.

Made to a standard

What you are actually buying.

No proprietary blend, no vague wording. Four things, stated plainly.

Grade
Pharmaceutical-grade NAD⁺Concentrated, and nothing else riding along with it.
Made in
The United KingdomNot imported, not repackaged.
Format
Pre-loaded auto-injectorDoses are measured at the factory, not by you at the kitchen table.
Support
A UK-based teamReachable by a person, not a form that disappears.

Our ingredients

Two ingredients. Nothing else in the vial.

No buffers, no preservatives, no stabilisers. Stability comes from how it is manufactured, not from what is added to it.

The NAD+ molecule

NAD⁺

The active Nicotinamide Adenine Dinucleotide

The primary active ingredient, supporting cellular energy production, mitochondrial function and NAD⁺ metabolism.

Water for Injection

Pharmaceutical-grade sterile water. The only other thing in the formulation.

Questions

The things people ask before they order.

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. 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.

NAD⁺ is a coenzyme your body already makes and uses in every cell. What is in the pen is pharmaceutical-grade NAD⁺ and water for injection, made in the United Kingdom, with nothing else added. Doses are measured at the factory rather than by you.

It is still an injectable. If you have a diagnosed medical condition, take prescription medication, or are unsure whether it is right for you, speak to your GP or pharmacist before you start.

It is a subcutaneous injection, which means it goes into the fat layer just under the skin rather than into muscle or a vein, using a short fine needle. The pen is pre-loaded, so there is nothing to draw up or measure.

The injection itself is over in a few seconds. Sensation varies from person to person. If one site feels sore, use a different one next time.

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. If you are not sure, ask before you start rather than after.

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.

Yes, at any time from your account. There is no minimum term and no cancellation step to negotiate.

You can also skip a delivery if you are away or still have a pen in the fridge.

Free UK delivery, with a UK-based team if you need to reach someone.

On a plan, your next pen arrives before the last one runs out, so the every-other-day routine never has a gap in it.

Verified reviews

What people actually say.

£175.00per month
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