NAD+ in Skincare: The Ingredient Everyone’s Talking About — But Does It Actually Reach Your Skin?

If you have been anywhere near a skincare shelf or a wellness feed lately, you have seen NAD+. It is in serums, supplements, IV drips, and now , increasingly , clinical-grade skincare. The claims around it are bold: cellular renewal, DNA repair, reversing the visible signs of ageing at the most fundamental level your biology will allow.

As an aesthetic doctor, when something arrives with that kind of momentum, my first instinct is not excitement. It’s questions. The main one being: does it actually get in?

The Ingredient Itself Is Genuinely Interesting

Let me start with what NAD+ actually is, because the science behind it is worth understanding , regardless of what you think about the skincare products built around it.

NAD+ stands for nicotinamide adenine dinucleotide. It is a coenzyme present in every living cell, essential for energy production and crucially , DNA repair. When your skin is exposed to UV radiation, pollution, or the general wear of daily life, your cells sustain damage. NAD+ is part of the biological machinery that identifies and repairs that damage.

The reason this matters for ageing is straightforward: NAD+ levels decline significantly as we get older. By the time most people are in their 40s, they have roughly half the NAD+ they had in their 20s. As those levels fall, the skin’s capacity to repair itself slows. That translates into dullness, fine lines, uneven texture, and the loss of that quality skin has when it’s functioning at its best.

The biology is solid. This is not a made-up problem.

The Question That Every Doctor Should Be Asking

Here’s where it gets more complicated and where I think it’s important to be honest.

NAD+ is a relatively large, unstable molecule. Skin is designed to keep things out , that is rather the point of it. For an ingredient to have a meaningful effect at a cellular level, it needs to get past the skin’s barrier and into the layers where those cells actually live. With NAD+, that’s a genuinely open scientific question.

Topical delivery of large molecules is one of the most actively researched areas in dermatology and cosmetic science right now, and the honest answer is that we are still learning what’s possible, what’s effective, and what constitutes meaningful penetration versus superficial contact. I say this not to dismiss the ingredient , but because I think patients deserve to know what the conversation actually looks like at a scientific level, rather than what the marketing version of it looks like.

Why the Formulation Approach Matters

This is where some products in this space make more interesting choices than others.

The Obagi NU-GEN Cellular Renewal Serum, for example, takes an approach that addresses the penetration challenge directly rather than ignoring it. Rather than relying solely on NAD+ itself, the formula pairs it with NMN (nicotinamide mononucleotide) and niacinamide , both precursors and boosters of NAD+ that are smaller in molecular size and better understood in terms of skin absorption.

Niacinamide in particular has a decades-long track record in skincare. It’s well-absorbed, well-tolerated, and has robust clinical evidence behind it for a range of skin concerns including texture, pigmentation, and barrier function. Building a NAD+ formula around an ingredient like that is a scientifically thoughtful approach — it’s not relying on one molecule to do everything.

Whether the combination achieves what the best-case science suggests it could , that is something ongoing research will continue to clarify. But the formulation logic is sound, and that matters.

What This Category of Skincare Is Actually Trying to Do

Stepping back from any specific product: what excites me about NAD+ as a direction in skincare is what it represents conceptually.

Most anti-ageing skincare works at the surface. It hydrates, fills, reflects, temporarily plumps. Those things have value. But the emerging category of cellular or longevity skincare is attempting something more ambitious , supporting the biological processes that keep skin functioning well, rather than simply masking the signs that those processes have slowed.

That shift , from correction to cellular support , is where the most interesting science in this space is heading in 2026. NAD+ sits at the centre of that conversation, and whatever the final word on topical delivery turns out to be, the underlying biology is genuinely important.

Who Might Find This Worth Exploring

If you are someone who invests thoughtfully in your skincare and you’re drawn to ingredients with a strong scientific rationale , NAD+ formulations are worth understanding and, if it aligns with your routine, exploring. They layer well with most existing routines. Niacinamide , a core component of most NAD+-boosting serums , is one of the most compatible actives in skincare; it plays well with retinol, vitamin C, acids, and most other ingredients people are likely to be using.

As with any ingredient that works gradually and systemically rather than immediately and visibly, realistic expectations matter. This is not a category that offers overnight transformation. It’s a category that’s making a longer-term argument and how compelling that argument is will become clearer as more clinical evidence accumulates.

My Honest Take

I find NAD+ as a skincare concept genuinely interesting. The science of cellular NAD+ decline is real. The logic of trying to support that at a topical level is reasonable. And the smarter formulations in this space , those that lean on precursors and established actives alongside NAD+ itself , are taking a more credible approach than the ones that simply print NAD+ on a label and hope for the best.

What I will say is that if you’re looking for a serum built around coherent science and a thoughtful formulation approach, this category is worth your attention.

As always , if you’d like to talk through whether something like this makes sense as part of your specific routine, that’s exactly the conversation I love having in clinic.

If you would like to know what NAD+ actually can do for you, that is what the online consultation is for. You fill in a short form, I review it personally, and you get back a written routine built around your skin, your hormones, your stage of life. £39.99, and the full cost is refunded as credit on anything you buy from the shop afterwards , so if you order your products through us, the consultation is essentially free.

Start your online skincare consultation now.

What is one skincare ingredient you’ve always been curious about but never fully understood? Drop it below and I’ll answer every one.