Walk down any skincare aisle and the promise is always the same. This cream, this serum, this ten step routine, and you'll glow. So you buy it, you layer it on, and your skin looks... fine. Not bad. Just not the lit from within thing you were sold.
Here's a thought that doesn't get enough airtime. Your skin is an organ, the biggest one you've got, and like the rest of you it's made of cells that need energy to do their job. No amount of topping it up from the outside fixes a problem that starts on the inside. And one of the things working away inside those skin cells is NAD+.
Let me explain how NAD+ ties into skin, what the research actually shows, and why "glow" might be more about cellular housekeeping than the next miracle serum.
Your skin is busier than you think
Skin doesn't just sit there. It's constantly renewing itself, shedding old cells and building new ones, healing tiny bits of damage, and defending against everything the day throws at it. Sun, pollution, stress, late nights, all of it lands on your skin.
All that work costs energy. Your skin cells, like every other cell, rely on NAD+ to turn fuel into the energy they need to keep repairing and renewing. When that energy supply is healthy, the renewal cycle hums along. When cells are running low, the housekeeping slows down, and tired cells tend to show up as tired looking skin.
Where NAD+ fits in
NAD+ does a few things that matter a lot for skin.
It powers energy production, which the constant renewal of skin cells depends on. It's also needed for PARPs, the enzymes that repair damaged DNA, and your skin takes a steady stream of DNA damage from sunlight in particular. On top of that, NAD+ fuels sirtuins, which help cells manage stress and oxidative damage, the kind of wear and tear that builds up over years and shows on your face.
So NAD+ isn't a "skin ingredient" in the way a moisturiser is. It's more like the power supply behind your skin's own repair crew. And here's the catch you might already have guessed: NAD+ levels naturally decline as you age. Less cellular energy, a slower repair crew, and over time that contributes to the visible signs we lump together as ageing.
What the research actually says
Let me keep this honest, because the beauty industry rarely does. The science linking NAD+ to skin is real but still early, and a lot of the strongest work is in labs rather than large human trials.
What's well established is the underlying biology. NAD+ genuinely powers the energy, DNA repair and stress responses that skin health depends on. Researchers are actively exploring how supporting NAD+ might help skin cope with sun damage and oxidative stress, and the early signals are interesting.
What we can't honestly claim is that NAD+ erases wrinkles or reverses ageing. Anyone promising that is way ahead of the evidence. The fair way to put it is this: NAD+ supports the systems your skin uses to repair and protect itself, and looking after those systems is a reasonable thing to do. Glow, realistically, is what healthy, well functioning skin looks like, not a special effect.
How to actually support your skin from the inside
The boring truth is that the best things for your skin are the best things for the rest of you.
Protect it from the sun. Nothing on this list matters as much. UV is the single biggest driver of visible skin ageing, and it's also what hammers your skin's DNA repair systems the hardest. Sunscreen is not optional.
Sleep. Your skin does a lot of its repair work overnight, which is why "beauty sleep" is more literal than it sounds. Skimp on sleep and you're cutting into prime repair time.
Eat for it. Plenty of plants, enough protein, and not living on sugar all support the cells doing the renewing.
Manage stress and don't smoke. Both pile on the oxidative stress your skin then has to clean up.
And support your NAD+. Since your skin's repair crew runs on cellular energy, keeping your NAD+ topped up fits naturally into a skin friendly routine. Our SmartStrip+ makes it about as easy as it gets: it dissolves on your tongue in seconds, no needles, no pills, nothing fiddly. For a higher dose, we also offer pen and vial formats.
None of this replaces a good sunscreen and decent sleep. It works alongside them. Think of it as supporting the skin you have rather than chasing a quick fix.
The short version
Your skin is constantly repairing and renewing itself, and that work runs on cellular energy that NAD+ helps provide. NAD+ also feeds the DNA repair and stress defence systems your skin leans on, and those systems naturally slow as NAD+ declines with age. The science here is promising but still early, so the honest goal is supporting healthy, well functioning skin rather than chasing miracles. Sun protection, sleep, good food and supporting your NAD+ all pull in the same direction.
So before you buy another serum, it might be worth thinking about the glow as an inside job too.
Want an easy way to support your skin from within? Try a SmartStrip+ routine. Needle free, fast dissolving, and simple enough to actually keep up with every day.
What's your skin goal right now? More glow, calmer skin, or just looking less knackered than you feel?
This information is for education only and isn't medical advice. Please talk to a qualified healthcare professional before starting any new supplement, especially if you're pregnant, breastfeeding, managing a health condition, or taking prescription medication.
