What It Is and Who It Is For
VikingMan is a men’s telehealth service selling subcutaneous NAD+ injections you give yourself at home, advertised at “$10 per shot” after a $5 online visit, on a monthly or quarterly subscription.
It is marketed to men who want more energy, sharper thinking and slower aging — the longevity market.
This review is mostly about evidence, because that is where the interesting part is. The page cites nine references, which is more than most. So we read them.
Affiliate disclosure: we are paid $50 per signup through our links. This review recommends caution, which pays us nothing — every regulatory and evidence check below was run against public databases you can query yourself, on 8 August 2026.
Read This First
This article is information, not medical advice, and we are not clinicians. Talk to a licensed clinician who knows your history and your medication list before starting or changing any treatment — especially an injectable one.
Nothing here promises or rules out an outcome. Where we report evidence, we give the source and the population it came from. Absence of trial evidence is not proof that something does not work — it means nobody has demonstrated that it does.
There Is No FDA-Approved NAD+ Product
Start with the regulatory fact, because everything else sits on top of it.
We searched the FDA’s Drugs@FDA approvals database for nicotinamide adenine dinucleotide, NAD, nicotinamide riboside and nicotinamide.
No approved drug product for any of them.
We validated the query against a positive control: testosterone cypionate returns 10 approvals, including Depo-Testosterone. So the search works, and the zero is real.
VikingMan does disclose this, and fairly. Their page says the product is “Compounded & made-to-order by a licensed pharmacy.” That is honest and we credit it.
What compounding means matters. A licensed pharmacy may prepare a medicine for an individual patient against a prescription — that is lawful. But FDA does not review compounded products for safety, effectiveness or manufacturing quality before they are sold. There is no approval, no efficacy review, and no premarket inspection of that specific formulation.
Which makes one phrase on the page worth isolating: “FDA Registered Pharmacy.”
Registration is an administrative listing. It means a facility has told the FDA it exists. It is not approval of the medicine, not a finding that it works, and not a quality endorsement. Sitting in a row of trust badges beside “Online Prescription Included,” it reads like a seal it is not.
We Read Their Citations
Credit first: the page carries a numbered reference list with nine sources, most of them real PubMed papers. Most supplement and telehealth marketing cites nothing at all. Providing citations invites checking, and that is a good instinct.
So we checked.
| The claim on the page | What the cited source actually is |
|---|---|
| “Helps with metabolism and weight loss” | A study titled “A key NAD+ intermediate, treats the pathophysiology of diet- and age-induced diabetes in mice” |
| “Replenishes energy stores to counter fatigue” | “PARP-1 inhibition increases mitochondrial metabolism through SIRT1 activation” — a mechanistic paper |
| “NAD+ is the closest we’ve gotten to a fountain of youth” | A TIME magazine article |
| “Slows aging & reduces body inflammation” | Review articles on NAD+ in cardiac health, senescence and viral infection |
A mouse study is being used to support a weight-loss claim to human customers — and the study is about a NAD+ intermediate and diabetes pathophysiology, not about injected NAD+ and not about weight loss in healthy men.
None of these papers are fake, and none of this is fraud. Mechanistic work, animal studies and review articles are legitimate, valuable science. They are simply not evidence that an injection will give a particular person more energy, better memory or less body fat.
The pattern is consistent: real citations, attached to claims they do not establish. A footnote marker beside a benefit implies a study behind it — and most readers will never click.
How Much Human Evidence Exists
We ran the obvious question through PubMed: how many randomised controlled trials exist of NAD+ given by injection, infusion or subcutaneously, in humans?
Four records. We read all four.
| Record | What it actually is |
|---|---|
| 2026 | A genuine randomised placebo-controlled trial of NAD — in heart failure caused by ischemic cardiomyopathy |
| 2012 | A trial of SRT2104, a SIRT1 activator drug — not NAD+ |
| 2011 | Hypertonic saline in acute heart failure — unrelated |
| 2006 | Intravenous amino acids and ethanol elimination — unrelated |
So: one real randomised trial, in patients with heart failure. We found no randomised trial of injected NAD+ in healthy adults for energy, mental clarity or anti-aging — the three things this product is sold for.
For scale, the same query form returns 3,595 randomised trials for testosterone.
Two honest qualifications. First, the existence of a 2026 placebo-controlled trial shows serious researchers take NAD seriously — this is not fringe biology, and the picture may change. Second, absence of evidence is not evidence of absence. Nobody has shown these injections do nothing; they have simply not shown they do something, in people like you.
The oral precursor literature is considerably larger — the same search approach returned 44 randomised trials of oral nicotinamide riboside or nicotinamide mononucleotide. If you are interested in NAD biology, that is where most of the human data is, and those are inexpensive over-the-counter supplements rather than prescription injections.
The Molecule Itself
The marketing rests on one mechanical argument: injections “deliver the coenzyme directly into the bloodstream, bypassing digestion for maximum efficacy, unlike oral supplements.”
The first half is true. Oral NAD+ is largely broken down in the gut, and injecting does bypass that. No argument.
The second half is where it slips. Getting a molecule into your blood is not the same as getting it into your cells — and NAD+ does its work inside cells.
Here is NAD+ as PubChem describes it:
| Property | NAD+ | Typical of good membrane permeability |
|---|---|---|
| Molecular weight | 663.4 | Under ~500 |
| XLogP (fat-loving vs water-loving) | −6 | Roughly 1 to 3 |
| Polar surface area | 321 Ų | Under ~140 Ų |
It misses on all three, and not narrowly. An XLogP of −6 describes a molecule that strongly prefers water to fat, and a cell membrane is fat.
The generally understood route is that circulating NAD+ is broken down outside the cell into smaller precursors, which are transported in and rebuilt into NAD+ inside.
If that is what happens, the injection is an expensive way to deliver precursors — which are also available orally, over the counter, and are where most of the human trial evidence sits.
To be precise about what this is: our reading of published physicochemical properties, not a finding from a clinical trial of this product. It does not prove the injections have no effect. It does mean the phrase “delivers the coenzyme directly… for maximum efficacy” describes a mechanism that the molecule’s own properties argue against.
A Supplement Disclaimer on a Prescription Drug
At the foot of the page, beneath the claims, sits this:
“The above statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.”
That is the standard dietary supplement disclaimer — the sentence required on a bottle of vitamins. This is a compounded prescription injectable obtained after a medical consultation.
And read it against what the same page says above it: “Promotes healthy brain function & slows down cognitive decline,” “Decreases chronic fatigue,” “Shown to help with weight loss,” “Tackles 7 of the 12 causes of aging.”
Those describe effects on conditions. The disclaimer says the product is not intended to affect any disease. Both cannot be doing honest work on the same page.
The practical reading for a buyer: the disclaimer is the part with legal weight. Treat the bullet points above it as marketing, not as a description of what you are buying.
What It Costs, and What They Do Not Tell You
What we could verify:
- Online visit: $5, refunded in full if a physician decides you are not a suitable telemedicine candidate. That is genuinely cheap and fair
- “$10 per shot,” shown against a $47.99 reference price
- Not covered by insurance
- Free shipping, discreet packaging, monthly or quarterly delivery
- No sign-up or cancellation fees; cancel anytime
What we could not find anywhere: the monthly total.
A per-dose price without a dose frequency is not a price. The page never says how many shots a month you receive. A testimonial on the same page mentions “1 to 2 shots per week”, which at the promotional rate would imply roughly $40 to $90 a month — but that is our arithmetic from a customer quote, not a published price.
Get the monthly total in writing before you give a card. The brief we work from asks us to report realistic all-in monthly cost, and we cannot, because they do not publish it.
On the subscription mechanics:
- Shipments are monthly or quarterly by default; you can switch to on-demand only after your first order arrives
- The terms contain an Auto-Fill provision: “You consent to us automatically billing your credit card”
- “All service fees are non-refundable and fully accrued once services are provided”
- Shipments cannot be returned — normal and correct for dispensed medication
- Maximum liability is capped at $100
- Availability is limited to states where their physicians are licensed, and the list is not published — check before you pay
The Counters at the Bottom of the Page
The landing page carries scarcity messaging of a kind that belongs on a flash-sale site, not a prescription drug page:
- “Back In Stock – Order Now For $10 Per Dose”
- “In Stock (67) – Order Now For Quick Delivery”
- “Selling Fast: 82 Packs Sold In Last Hour”
Urgency counters exist to shorten deliberation. That is their entire purpose, and it is a reasonable tool for selling trainers. Applied to a decision about injecting yourself weekly with a compounded drug, it is pushing in exactly the wrong direction.
Two smaller inconsistencies we noticed while checking. The landing page claims “4.9 (2700+ Reviews)” while the NAD category page on the main site says “1000+ Reviews” — same brand, same product, same day. And the category page describes an injectable as “Sugar-free & Gluten-free” and “All-Natural.” Those are food labels. They tell you the copy was written for the supplement aisle.
Safety, Side Effects and Who Should Not Use This
The page names one side effect: irritation around the injection site, with advice to rotate sites and apply an over-the-counter hydrocortisone cream.
That is thin for a product you inject into yourself every week. There is no contraindication list, no drug-interaction guidance, and no statement of who should not use it.
And here is the uncomfortable link back to the evidence section. The reason the side-effect profile of subcutaneous NAD+ in healthy people is not well characterised is the same reason the benefits are not: the randomised trials have not been done. A short side-effect list is not reassurance — it can simply mean nobody has looked systematically.
General points worth knowing:
- Any self-injection carries risk of bruising, injection-site reactions and infection where sterile technique is poor. Get shown how, and dispose of sharps properly
- Intravenous NAD+ is widely reported to cause chest tightness, nausea and flushing when infused quickly. Subcutaneous dosing is different, but it is a signal the molecule is not inert
- Do not use if pregnant or breastfeeding — there is no safety data
- If you have active cancer, speak to your oncologist first. NAD metabolism intersects with tumour metabolism and the science there is genuinely unsettled
- Have a clinician review your full medication list, including anything bought online
- If you are tired all the time, get that investigated properly. Fatigue has causes worth finding — thyroid disease, anaemia, sleep apnoea, depression, low testosterone. An unapproved injection is not a substitute for a diagnosis
What They Get Right
This review is critical, so the genuine positives deserve to be stated clearly rather than buried.
- They say it is compounded. “Compounded & made-to-order by a licensed pharmacy” is on the page. Many sellers of this category do not say so at all
- They disclaim the endorsements. In the footer: “Dr. Conlon, David Sinclair, Joe Rogan, all other referenced quotes, and studies does not endorse the claims, views, statements, or products offered by Viking Man.” That is accurate and legally careful — even if it sits at the bottom while “Harvard Medical School” sits at the top
- The $5 visit is refunded if a physician says you are not a candidate — so the gate is not purely a formality
- They provide citations at all, which invites the checking we did
- No sign-up or cancellation fees, and cancel anytime
- State availability is correctly framed around physician licensure rather than fudged
- Free shipping, discreet packaging, and free follow-up messaging with a physician
How It Compares
| VikingMan NAD+ | Oral NR / NMN supplement | Seeing your doctor about fatigue | |
|---|---|---|---|
| FDA-approved | No — compounded | No — supplement | Not applicable |
| Randomised human trials | 1, in heart failure patients | 44 | The whole of medicine |
| Requires injecting yourself | Yes, weekly | No | No |
| Finds the cause of your fatigue | No | No | Yes — that is the point |
| Cost | Not published; likely $40–$90/mo | Often less | Often insured |
The comparison that matters is the third column. Persistent fatigue and brain fog are symptoms with findable causes. The main risk of this product is not that it harms you — it is that it delays somebody from finding out why they are exhausted.
Who Should Consider It and Who Should Not
It may reasonably suit you if you:
- Have already had fatigue properly investigated and come back clear
- Understand you are buying an unapproved compounded product with essentially no randomised evidence in people like you, and are comfortable with that
- Can afford it as discretionary spending, not at the expense of proven care
- Are comfortable self-injecting and have discussed it with your own clinician
Do not buy this if you:
- Have unexplained fatigue. See a clinician and get it worked up first — that is the genuinely useful step
- Are pregnant or breastfeeding, or have active cancer without oncology advice
- Believe you are buying an FDA-approved medicine. You are not, and no such NAD+ product exists
- Are persuaded mainly by the footnote markers. We read the footnotes; a mouse study sits behind the weight-loss claim
- Cannot get the monthly cost confirmed in writing before handing over a card
- Would be spending money you need for care that is actually proven
Pros and Cons
Pros
- States plainly that the product is compounded by a licensed pharmacy
- Explicitly disclaims that quoted scientists and public figures endorse it
- $5 online visit, fully refunded if you are judged unsuitable
- Provides a numbered citation list, which invites verification
- No sign-up or cancellation fees; cancel anytime
- Free shipping, discreet packaging, free follow-up messaging with a physician
- State availability framed honestly around physician licensure
- Names injection-site irritation and gives practical advice on managing it
Cons
- No FDA-approved NAD+ product exists, verified against a positive control
- We found one randomised NAD trial in humans — in heart failure, not healthy men
- The weight-loss claim is footnoted to a study conducted in mice
- The fatigue claim is footnoted to a mechanistic PARP-1 paper
- A dietary supplement disclaimer appears beneath explicit disease claims
- “FDA Registered Pharmacy” implies far more than facility listing means
- The all-in monthly cost is not published anywhere we could find
- Scarcity counters — “82 Packs Sold In Last Hour” — on a prescription injectable
- Review counts differ between their own pages: 2,700+ versus 1,000+
- An injectable described as “Sugar-free & Gluten-free” and “All-Natural”
- Subscription by default; on-demand only after the first order ships
- Very thin safety information; no contraindications listed
- Liability capped at $100; state list not published
Limitations of This Review
Our general web search was unavailable, so this is built from primary sources read on 8 August 2026: VikingMan’s landing page, NAD category page, FAQ, terms and how-it-works pages, plus the FDA Drugs@FDA database, PubMed via NCBI E-utilities, and PubChem.
We could not reach Trustpilot, the BBB or Reddit, so we have no independent customer data — nothing on delivery reliability, how substantive the physician review is, or whether people report benefit. The 4.9 rating and the review counts are the company’s own unverified figures.
We did not complete an intake or purchase, so we have not seen the actual prescribing questions, the pharmacy used, the dose prescribed, a certificate of analysis, or the checkout price. That last one is why we cannot give you a monthly cost.
Our literature searches are a snapshot of one database with one query form on one day. A differently-worded search would return a somewhat different count, and PubMed does not index everything. We read all four returned records rather than reporting the raw number, but we cannot claim to have found every relevant study. The membrane-permeability discussion is our interpretation of published physicochemical properties, not a measurement of what this product does in a body.
Most importantly: we are not clinicians, this is not medical advice, and nothing here should replace a conversation with someone qualified who knows your history.
Frequently Asked Questions
Is NAD+ injection FDA approved?
No. We searched the FDA Drugs@FDA approvals database on 8 August 2026 for nicotinamide adenine dinucleotide, NAD, nicotinamide riboside and nicotinamide, and found no approved drug product for any of them. We validated the query against a positive control - testosterone cypionate returns 10 approvals - so this is a genuine zero. VikingMan does state plainly that its product is "compounded and made-to-order by a licensed pharmacy," which is lawful, but compounded medicines are not reviewed by FDA for safety, effectiveness or manufacturing quality before sale.
What does "FDA Registered Pharmacy" actually mean?
Less than it sounds. Facility registration means a pharmacy or outsourcing facility is listed with the FDA - an administrative status. It is not FDA approval of the medicine, not a finding that the product works, and not a quality endorsement. Registration and approval are entirely different things, and the phrase appears on the landing page next to "Online Prescription Included" where it reads like a seal of approval.
How much does VikingMan NAD+ cost?
We could not determine the all-in monthly cost from their public pages, which is itself the problem. The landing page advertises "$10 per shot" against a $47.99 reference price, and the FAQ says the online visit costs $5 and is refunded if a physician decides you are not a suitable candidate. But the page never states how many doses a month you get, and a per-dose price without a dose frequency is not a price. One customer testimonial on the page mentions "1 to 2 shots per week," which would imply roughly $40-$90 a month at the promotional rate. Ask for the monthly total before you give a card.
Is there a subscription?
Yes, by default. Their FAQ says shipments come monthly or quarterly depending on what you choose at the online visit, and that you can only switch to on-demand shipments after you receive your first order. The terms include an Auto-Fill provision under which you consent to automatic billing of your card. To their credit they say there are no sign-up or cancellation fees and you can cancel anytime, and their FAQ states shipments cannot be returned - normal for dispensed prescription medication.
Does the evidence support the energy and anti-aging claims?
Not in the population being sold to. We searched PubMed on 8 August 2026 for randomised controlled trials of NAD+ given by injection, infusion or subcutaneously in humans. Four records came back; we read all four. One is a genuine 2026 randomised placebo-controlled trial - in patients with heart failure caused by ischemic cardiomyopathy. The other three matched on keywords and are about a SIRT1 activator drug, hypertonic saline in heart failure, and intravenous amino acids and ethanol elimination. So we found no randomised trial of injected NAD+ in healthy adults for energy, mental clarity or anti-aging. For scale, the same query form returns 3,595 randomised trials for testosterone.
What is wrong with their citations?
They cite real papers, which is more than many marketers do - but several do not support the claim attached to them. The reference for "Helps with metabolism and weight loss" is a study whose own title says it treats diet- and age-induced diabetes in mice. The reference for "Replenishes energy stores to counter fatigue" is a mechanistic paper titled "PARP-1 inhibition increases mitochondrial metabolism through SIRT1 activation." The David Sinclair "fountain of youth" quote is footnoted to a TIME magazine article, not a study. Mechanism papers, review articles and mouse work are legitimate science; they are not evidence that an injection will give a particular person more energy.
Do the scientists quoted endorse VikingMan?
No, and the company says so itself. In small print at the foot of the landing page: "Dr. Conlon, David Sinclair, Joe Rogan, all other referenced quotes, and studies does not endorse the claims, views, statements, or products offered by Viking Man." That disclaimer is accurate and they deserve credit for including it - but it sits at the very bottom, while "David Sinclair, PHD, Harvard Medical School" appears at the top beside the price.
Why does injecting it not settle the absorption question?
Because getting a molecule into your blood is not the same as getting it into your cells. NAD+ is large and extremely water-loving: PubChem lists a molecular weight of 663.4, an XLogP of -6 and a topological polar surface area of 321 square angstroms. Molecules with those properties do not readily cross lipid cell membranes. The generally understood route is that circulating NAD+ is broken down outside the cell into smaller precursors, which are then transported in and rebuilt into NAD+. So the marketing line about delivering the coenzyme directly for maximum efficacy does not describe the biochemistry well - injection may function largely as an expensive way to deliver precursors. This is our reading of published physicochemical data, not a claim from a clinical trial.
What are the side effects?
The landing page names one: irritation around the injection site, with advice to rotate sites and use an over-the-counter hydrocortisone cream. That is thin for an injectable. Any injection carries risks of bruising, injection-site reaction and infection if sterile technique is poor. Intravenous NAD+ is widely reported to cause chest tightness, nausea and flushing when infused quickly. Because the randomised trial base in healthy people is essentially absent, the honest answer is that the side-effect profile of this route in this population is not well characterised - which is a reason for caution, not reassurance.
Who should not use this?
Anyone who is pregnant or breastfeeding, since there is no safety data. Anyone with active cancer should speak to their oncologist first - NAD metabolism intersects with tumour metabolism and the science there is genuinely unsettled. Anyone who cannot self-inject with proper sterile technique. Anyone taking prescription medication should have a clinician review interactions. And anyone hoping to treat a diagnosed condition should know this product is not approved to treat anything. Talk to a licensed clinician who knows your history before starting.
Verdict
2.5 / 5
Real citations attached to claims they do not support, and a supplement disclaimer at the bottom of a page selling a prescription injectable.
VikingMan does several things better than the worst of this category. It says the product is compounded. It disclaims the endorsements it implies. It charges $5 for the consultation and refunds it if you are turned down. And it publishes citations — which is the reason this review could be written at all.
But the citations do not hold. The weight-loss claim is footnoted to a study conducted in mice. The fatigue claim is footnoted to a paper about PARP-1 inhibition. The “fountain of youth” quote is footnoted to a magazine.
And when we searched for the trials that would settle it, we found one — published in 2026, in patients with heart failure caused by ischemic cardiomyopathy. Not healthy men. Not energy, clarity or aging. The same search returns 3,595 randomised trials for testosterone, so the method is not the problem.
Meanwhile there is no FDA-approved NAD+ product of any kind — we checked, and validated the zero against a control — the page never states what a month costs, and a counter at the bottom insists 82 packs sold in the last hour.
NAD biology is genuinely interesting, and the researchers quoted here are doing real work. That is exactly why it is worth being careful: interesting biology is the raw material this kind of marketing is made from, and the distance between “this pathway matters in aging” and “this injection will make you feel better” is where the evidence should be, and currently is not.
If you are tired, start with a clinician and a blood test, not a subscription. If you have already done that and want to try this anyway, go in knowing what it is — an unapproved compounded product, with essentially no randomised evidence in people like you, at a price they will not print.
Before You Order
If you are persistently tired or foggy, see a clinician and get it investigated first - fatigue has findable causes including thyroid disease, anaemia, sleep apnoea, depression and low testosterone, and the real risk of a product like this is delay rather than harm. If you proceed anyway, know what you are buying: NAD+ injections are compounded, and we found no FDA-approved NAD+ product of any kind when we searched the approvals database, validated against a control. Note that FDA Registered Pharmacy means a facility is listed with the agency, not that the medicine is approved. We searched PubMed for randomised trials of injected NAD+ in humans and found one, in heart failure patients - none in healthy adults for energy, clarity or aging - while the page footnotes its weight-loss claim to a study in mice. Ask for the total monthly cost in writing before giving a card, because the page advertises $10 per shot but never says how many shots a month, and shipments are a subscription by default with auto-billing, switchable to on-demand only after the first order. Confirm your state is covered. Tell the prescriber every medication you take, do not use it if pregnant or breastfeeding, and speak to your oncologist first if you have active cancer. This is information, not medical advice - consult a licensed clinician before starting or changing treatment. All details checked 8 August 2026. We are paid $50 per signup, and this review still says be careful.