Do NAD+ patches work?

Nobody has published a study measuring NAD+ getting through human skin from a patch. Three searches run against PubMed in September 2026 turn up no such study at all, and the two transdermal NAD+ papers that do exist were done in cells, in skin samples and in worms. Neither was done in people, and neither used a patch.

What the evidence says

The tightest of the three searches asks for NAD+ together with skin permeation, skin absorption or percutaneous absorption. It returns 0 records. Not a small number of records, not an inconclusive set — nothing.

PubMed, searched September 2026. The query ("NAD+"[Title/Abstract] OR "nicotinamide adenine dinucleotide"[Title/Abstract]) AND ("skin permeation"[Title/Abstract] OR "skin absorption"[Title/Abstract] OR "percutaneous absorption"[Title/Abstract]) returned 0 records. This one returned nothing at all. A count is what one search returned on one day, not proof that nothing exists anywhere.

Widening it to anything with NAD+ and patch or transdermal in the title returns 4 records. Two of them are real transdermal NAD+ work and are described below. The other two use the word “patch” for something else entirely.

PubMed, searched September 2026. The query ("NAD+"[Title] OR "NAD"[Title] OR "nicotinamide adenine dinucleotide"[Title]) AND ("transdermal"[Title] OR "patch"[Title] OR "patches"[Title]) returned 4 records. Every hit was opened. Two are laboratory delivery papers (captured here as pmid 42170234 and 39312410); the other two use the word patch for something else entirely — a mouse coat-color mutant and a histochemical staining pattern in cat thalamus. A count is what one search returned on one day, not proof that nothing exists anywhere.

A search that returns nothing is not proof that nothing exists. It is evidence about what has been indexed and published, and the query is printed above so anyone can run it again and disagree with a result rather than with a claim. What it rules out is the thing a buyer needs: a published measurement of how much NAD+, if any, gets past human skin from a patch worn by a person.

What is actually sold

Very little, on this roster. Just 2 of 107 sellers publish a patch figure at all, between them 2 figures, and every one of them is a “from” floor rather than a rate you could budget against. Not one is a standing monthly price. Of the 2, 1 states anything in milligrams, and what it states is a concentration rather than a dose.

That is the commercial picture: a fringe route, priced from a floor, sold by the kit. Compare it with the injection, which has two orders of magnitude more sellers behind it on the same roster, or with the whole route census, which sets all nine side by side.

Here is how a seller describes it, in its own words rather than in ours. A benefit claim is never repeated as fact here, and quoting one is not endorsing it; it is showing you the sentence the seller’s page is actually making.

AgelessRx

“NAD+ Patches Support steady energy, endurance, and recovery with an easy, injection-free way to boost NAD+ for lasting cellular energy.” Read September 2026 from https://agelessrx.com/nad-injection/

Read that against the section above. The claim is about energy and recovery; the evidence a buyer would need is a measurement of how much of the molecule arrives, and that measurement has not been published.

What the laboratory work tested

Two papers are worth naming, because both are genuinely about getting NAD+ or a precursor through skin and neither supports a patch.

A delivery vehicle, tested in cells and skin samples

A 2026 paper describes an engineered carrier built to move NAD+ into skin, and reports results in cultured cells, in pig and human skin taken out of the body, and in the worm C. elegans. Its own abstract gives the reason the work was needed: NAD+ delivery to skin is limited by poor stability and tissue accessibility. A skin sample in a laboratory rig is not a person, and an engineered carrier is not the adhesive patch on sale. Kang S and 14 others, Ion-coupled transfersome complexes for enhanced transdermal NAD+ repletion and mitigation of cellular senescence signatures. Mater Today Bio, 2026. PubMed 42170234.

Microneedles, carrying a precursor

A 2024 paper coats 3D-printed microneedles with nicotinamide mononucleotide, a precursor rather than NAD+, and measures how much crosses human skin in a laboratory diffusion cell. Microneedles pierce the skin; that is the entire point of them, and it is the opposite of the case a stick-on patch has to make. Ali M and 7 others, 3D Printed Microneedles for the Transdermal Delivery of NAD+ Precursor: Toward Personalization of Skin Delivery. ACS Biomater Sci Eng, 2024. PubMed 39312410.

Both are ordinary, useful research. Neither says a patch works, and neither was designed to. The distinction that matters to a buyer is between a molecule that can be pushed through skin by a purpose-built vehicle in a rig and a molecule that crosses skin on its own from an adhesive square. The second one is what is on sale.

What to check before you pay

• Ask what the seller is claiming gets absorbed, and how much. A number would be a claim you could check. An adjective is not.
• Ask for the study. If a page cites one, read whether it was done in people and whether it used the product on sale. The two papers above are the ones most likely to be pointed at, and neither tested a patch on a person.
• Check whether it is NAD+ or a precursor. They are different molecules and get discussed as if they were one; telling them apart on a seller’s page has its own page here.
• Check what the figure is charged per. A floor is not a rate, and a kit is not a month.
• Compare it against a route that has been measured in people. Only one has: the IV.

None of this says a patch cannot work. It says nobody has published a measurement showing that it does, and a price is being charged in the meantime. Whether that is a reasonable purchase is your call; whether the evidence exists is not a matter of opinion, and the searches are printed above.

Every figure above is a seller’s own published number, with the route it buys, the milligrams it buys and the date it was read attached. None of it is medical advice, and nothing here is a recommendation to take or avoid anything. Talk to a licensed clinician who has your history in front of them.

The other 18

• NAD+ injection side effects

  Which questions are worth asking depends on the route, and on whether the seller states a dose at all.

• NAD+ IV vs injection

  A per-session price and a per-month price are not comparable until you have the milligrams for both.

• How often you take NAD+

  Frequency is usually a billing cadence before it is a clinical one. Here is how to tell which you are looking at.

• What NAD+ injections are

  A vial and syringes on a subscription, not a clinic drip. What sellers charge for one, how few state the milligrams, and what has been measured in people.

• What NAD+ IV therapy is

  A clinic session billed by the session, not by the month. What sellers publish about one, and the two studies that followed people through an infusion.

• The nine routes

  NAD+ is sold nine ways, and a third of the sellers name none of them. Every route, how many sellers use each, and how large the silent group is.

• “Route not stated”

  The second largest group on the roster is the sellers who did not say. Some wrote nothing; others wrote a sentence that still is not a route. Every one of those sentences.

• Sublingual NAD+ and precursors

  Two different molecules are sold under one word. On 18 of 26 sellers it took a second look at the page to tell which one was on sale.

• What a NAD+ price includes

  Most figures never say what is in the number, and whether a seller tells you depends on the route. What this roster can say, and the one thing it cannot.

• NAD+ price by route

  Is the spray cheaper than the injection? Fifteen sellers price both, and they do not agree with each other.

• Sellers that sell NAD+ more than one way

  A brand offering NAD+ two ways is offering two purchases at two prices. How many do, which routes travel together, and how many never say.

• Who states the milligrams

  A price without a dose is not comparable. The nasal sellers state milligrams more often than the injection sellers do, and the routeless figures state them least.

• How a route is billed

  Not one figure for the two routes that need a clinic is a standing monthly rate. Sublingual is the weekly route. What kind of number each route publishes.

• When the URL names a route

  A seller's own address is the first route claim a buyer meets. “Nasal” meant nasal every time. “Oral” never once meant the precursor a reader would expect.

• Pages that publish no price

  The most common outcome of opening a NAD+ product page is not a number. What the silent ones did instead, and the one signal that predicted them in advance.

• Prices in the markup

  Most NAD+ pages carry dollar amounts you are not shown. Why that is a reason to open the toggles rather than an accusation.

• The price behind the intake

  “They don’t publish a price” is only honest if you clicked the button. Thirty-three sellers were followed one click past the page. Almost none of it was a price.

• Pages that price two routes

  Where a spray and a needle are sold in one grid, a route choice looks like a price choice. Which routes get sold side by side, and how deep it goes.