I was 37, looking in the mirror after a week of bad sleep and back-to-back deadlines, thinking: when did my face start looking this tired? I hadn’t changed anything. That was the problem.
What I didn’t know then was that something was changing — just invisibly, at the cellular level.
In this article, you’ll learn:
- What NAD+ actually is and why it matters for skin after 35
- What the research says — and what it doesn’t (yet)
- The three delivery formats now available in the US: cream, nasal spray, and injection
- How I approach NAD+ within a J-Beauty barrier-first routine
Disclosure: Some links in this article are affiliate links. If you purchase through them, Hada Ritual may earn a commission at no extra cost to you.
Quick-Win Comparison Table
| Category | Product | Why Hana Finds It Interesting | Price | Where to Buy |
|---|---|---|---|---|
| Best for Skin-Targeted Use | BiltRx NAD+ Cream | Topical delivery — no needles, directly on the skin | From $299/month* | BiltRx NAD+ Cream → |
| Best for Cognitive + Whole-Body | BiltRx NAD+ Nasal Spray | The format I find most compelling for whole-body support | From $299/month* | BiltRx NAD+ Nasal Spray → |
| For Those Working with a Provider | BiltRx NAD+ Injection | Highest bioavailability — requires licensed provider consultation | From $449/month* | BiltRx NAD+ Injection → |
| Most Accessible Starting Point | NAD+ precursor foods (edamame, broccoli, salmon) | Free, food-based, the J-Beauty “food as ritual” approach | Free | Your kitchen |
All BiltRx products require an online medical consultation and provider approval. Pricing reflects monthly subscription plans.
My late 30s hit and my skin changed almost overnight — dullness, a dryness I’d never had before, and a flatness I couldn’t explain away with sleep debt alone. I tried layering more products. A richer cream here, a brightening serum there. The shelf got fuller. My skin didn’t get better.
That’s when I went looking for why — not what product to add next, but what was actually happening underneath.
The answer I kept landing on was NAD+. Or rather, the quiet disappearance of it.
In Japan, there’s an approach to aging called yojo — 養生 — the art of nourishing and preserving the body before problems arise. It’s not reactive. It’s not dramatic. It’s the philosophy of maintenance, of giving your body what it needs before the deficit shows on your face. That framing changed how I thought about NAD+ entirely. It wasn’t a cure. It was a form of care.
For a busy woman in her late 30s who doesn’t have the bandwidth for a 12-step overhaul, that reframe is everything. You’re not chasing a reversal. You’re staying ahead of a process that’s already underway.
What Is NAD+ — And Why Does Your Skin Care?
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every living cell. It helps cells produce energy, supports DNA repair after UV damage, and activates a class of proteins called sirtuins — NAD+-dependent enzymes studied for their potential role in longevity and aging regulation.
The problem is straightforward: research indicates that NAD+ levels decline significantly with age — a decline documented across human tissues including skin in a 2025 expert review in Nature Metabolism, with skin biopsies showing a negative correlation between NAD+ levels and increasing age. Some early research points to a meaningful NAD+ decline from the mid-30s onward — though the exact magnitude varies considerably by tissue and individual, and the field is still working to quantify this precisely in humans. The point isn’t the exact number. It’s the direction: consistently downward.
For skin specifically, some research indicates NAD+ depletion may be connected to reduced cellular repair capacity and increased oxidative stress — including from UV exposure, as described in published molecular research. Its role in directly influencing skin moisture retention is less established and merits further human study.
But the mechanism is real, and the science is moving. What remains less settled is exactly how well topical or supplemental NAD+ translates those cellular-level functions into visible skin changes.
The Three Formats — What I Actually Found
There are now three distinct ways to engage with NAD+ supplementation. They work differently, cost differently, and suit different comfort levels.
1. NAD+ Cream — The Skincare-First Entry Point
My shelf is full of things I take internally and then wonder what actually reached my skin. A cream at least answers that question directly.
The BiltRx NAD+ Cream is a compounded topical formulation, made to order by a licensed pharmacy — not mass-produced on a shelf. This distinction matters: compounded medications are not FDA-approved, and BiltRx is transparent about this. A medical consultation is part of the process. Results are individual.
Pros: Targeted skin delivery, no needles, integrates naturally into a layering routine. Some women find a cream format easier to commit to than a supplement regimen.
Cons: Compounded products can vary in formulation; not FDA-approved; prescription consultation required. From $299/month — more expensive than over-the-counter alternatives.
Who it’s for: Women who want to explore NAD+ specifically for skin aging, who prefer topical over oral or injectable routes, and who are comfortable working with a telehealth provider.
Who should skip: Anyone pregnant or breastfeeding — safety data for NAD+ in pregnancy is not established. Those with sensitive skin should approach any new active with caution.
Patch test recommended, especially for sensitive skin.
→ Explore BiltRx NAD+ Cream — from $299/month
2. NAD+ Nasal Spray — The Cognitive-Energy Option
The nasal spray is the format I find most interesting from a whole-self wellness standpoint — and the one that maps most naturally to the J-Beauty idea that skin reflects internal health.
I keep this one for the days when my face and my brain feel equally flat. It absorbs fast — no needles, no ritual — just a quick moment before I sit down to work. The appeal for women in their late 30s and 40s is real: the fatigue, the brain fog, the sense that recovery takes longer than it used to. These aren’t separate from skin — they’re signals from the same biological system under stress.
Some research suggests this delivery format may support mental clarity, focus, and energy levels, though long-term safety data is still being established.
Pros: Non-invasive, fast absorption, no injection required. Some users report noticing effects on energy and mental clarity relatively quickly.
Cons: Mild side effects may include nasal irritation, dryness, or a temporary tingling sensation. Long-term safety data is not yet established. Not FDA-approved. From $299/month.
Who it’s for: Women who want whole-body NAD+ support alongside skincare, particularly those experiencing energy or cognitive changes alongside visible skin aging.
Who should skip: Pregnant or breastfeeding women. Anyone with nasal sensitivity or chronic sinus conditions should consult a provider first.
→ Explore BiltRx NAD+ Nasal Spray — from $299/month
3. NAD+ Injection — The High-Bioavailability Route
The injection is the most clinical of the three options — and the one that requires the most careful conversation with a provider before starting. It’s the format most studied in research contexts, including early work on energy metabolism and cellular function.
Pros: Highest bioavailability — bypasses the digestive system entirely. For those working with an integrative medicine provider, it can be part of a structured protocol.
Cons: Requires a licensed provider. Pregnant women should avoid NAD+ injections due to lack of safety data; the same caution applies to nursing mothers. Side effects including headache have been reported, particularly at higher doses. Not FDA-approved. From $449/month.
Who it’s for: Those who want maximum delivery efficiency and are already working with a telehealth or functional medicine provider. Not a first step for the skincare-curious.
Who should skip: Pregnant or breastfeeding women, those with liver disease or dysfunction, and anyone not working directly with a licensed provider.
→ Learn more about BiltRx NAD+ Injection — from $449/month
The Honest Science Check
I want to be direct about what we know — and what we don’t — because I think you deserve that.
The mechanism behind NAD+ is real and well-established: it plays a central role in cellular energy and repair. What remains less clear is whether supplementing with NAD+ — topically, nasally, or via injection — reliably produces the skin or longevity benefits often advertised.
Researchers have noted that while NAD+ decline and aging are associated, the causal relationship isn’t fully established. As a 2025 expert review in Nature Metabolism notes, human clinical evidence for NAD+ supplementation remains limited overall, with most trials being small and short-term. Topical-specific human trials are particularly sparse.
That’s not a reason to dismiss it. It’s a reason to approach it with your eyes open.
The J-Beauty parallel I keep coming back to is this: the Japanese concept of yojo was never about dramatic intervention. It was about steady, consistent support — nutrition, sleep, low-irritation rituals, seasonal adjustment. NAD+ fits that philosophy as a layer — not a replacement for the foundations. If you’re not sleeping, not managing stress, not protecting your barrier — a nasal spray won’t fix that. But as part of a considered routine? There’s something worth paying attention to here.
How I Layer NAD+ Into a J-Beauty Barrier Routine
This is what a grounded, non-dramatic approach looks like in practice.
Morning:
- Gentle, pH-balanced cleanser — the less stripping, the better
- Hydrating toner — layered twice if skin feels tight
- NAD+ Cream, if using topically — applied to damp skin, then sealed with moisturizer
- SPF 50+ (non-negotiable; some research suggests NAD+ supports cellular repair from UV damage, but that’s not a reason to skip protection)
Evening:
- Oil cleanse + gentle second cleanse
- Essence or toner layering (the nana-korobi approach — slow, repeated hydration)
- NAD+ Nasal Spray, if part of your protocol — timing is flexible
- Barrier-supporting moisturizer with ceramides
Food-first support (free, always): Research notes that NMN (an NAD+ precursor) is found in edamame, broccoli, avocado, and cucumber. Salmon and mackerel contain NR, another precursor. These aren’t dramatic doses — but over time, consistent dietary habits compound.
FAQ
Q: Can I use NAD+ cream alongside retinol or actives I already use?
A: Possibly, but with caution. Layering with potent actives like retinoids, AHAs, or vitamin C may require spacing or adjustment to avoid irritation. A provider can review your full skincare routine and guide you in combining products safely. If you’re introducing NAD+ cream into an existing routine that already includes retinol, I’d add it on alternating evenings first and watch how your skin responds.
Q: How long until I’d notice any difference?
A: This is the honest answer: it varies significantly by individual. Some people report noticing effects on energy and mental clarity relatively quickly, while others find that more gradual benefits — like those related to cellular repair and metabolic support — develop over weeks to months of consistent use. For skin texture changes specifically, many practitioners suggest evaluating at 8 to 12 weeks minimum.
Q: Is NAD+ safe if I’m pregnant or breastfeeding?
A: Current guidance is clear: avoid it. Safety data for NAD+ injections during pregnancy has not been established, and the same caution applies to topical and nasal formats. Consult your OB before adding anything new during this time.
Q: Where can I get NAD+ products in the US without a prescription?
A: The BiltRx products linked in this article require an online medical consultation — but the process is fully telehealth, takes about 15 minutes, and you don’t need to leave home. If you’re looking for OTC options, NMN and NR supplements (NAD+ precursors) are available on Amazon and at iHerb without a prescription, though delivery formats and bioavailability differ. The cream and spray work via completely different mechanisms than an oral capsule.
Closing
You don’t have to get this perfect. Most of the women I hear from who’ve made the biggest shifts in how their skin looks and feels didn’t overhaul everything at once. They picked one thing, stayed consistent, and paid attention.
NAD+ is not a magic molecule. But it is a real one — and the science pointing toward its role in how skin ages is worth taking seriously, even if the full picture isn’t drawn yet.
If you’re curious about the BiltRx cream or nasal spray, both require a brief provider consultation — which is actually a feature, not a friction point. It means someone looks at your situation before you start.
→ BiltRx NAD+ Cream — from $299/month | NAD+ Nasal Spray — from $299/month | NAD+ Injection — from $449/month
Care taken before the deficit — that is what yojo means. The science is still learning. Your skin already knows to ask.
Have you tried NAD+ in any form? I’d love to hear what’s been working — or honestly, not working — for your skin in the comments.
Author Bio
Hana is a J-Beauty writer based in Japan who spent most of her 30s too busy to think about skincare — and paid for it in dullness, dryness, and a face that looked more tired than she felt. Now she writes about going slower and choosing better, for women who are finally ready to start.