Nicotinamide Riboside for Dogs

How an ingredient in your dog’s supplement becomes part of the NAD+ system.

By La Petite Labs Editorial 16 min read

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Nicotinamide riboside, usually shortened to NR, supplies material cells can use to make NAD+. That is why a supplement described as offering NAD+ support may list NR among its ingredients. NR is what goes into the formula; NAD+ is a molecule the body makes and uses.

The interesting question is what happens between the two. The answer runs through enzymes inside cells, changes during digestion, and experiments that measured quite different things. It also helps explain a label: the weight of an NR-containing powder, the amount of NR in it and the serving for your dog are three separate numbers.

NR has a defined route into NAD+ synthesis. An enzyme called NR kinase adds a phosphate group, producing NMN; another enzyme uses NMN to build NAD+. Oral metabolism can take additional routes before that material reaches a tissue. 1 9

An EFSA assessment describes short NR chloride studies in dogs, including a 28-day experiment. These provide metabolism and safety information, rather than evidence that NR alone improves a pet dog’s activity or lifespan. 7 The practical starting point is the ingredient line: which form, how much, and per what serving.

What is nicotinamide riboside?

NR belongs to the vitamin B3 family. Its name describes its structure: nicotinamide joined to ribose, a sugar. That small molecule is a precursor—a starting material—for NAD+. 8

NAD+ has jobs of its own. It participates in the reactions that turn nutrients into usable energy, and cells also consume it in maintenance processes. They therefore need ways to keep making it. NR is one of the materials that can enter this supply system. The broader NAD+ for dogs guide explains those everyday cellular jobs and the wider aging research. Here, the focus is the ingredient that may be printed on your dog’s supplement. 5

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How cells turn NR into NAD+

NR kinase adds a phosphate group to NR, creating NMN. A second enzyme, NMNAT, uses NMN to build NAD+. 1

In an experiment with mouse liver cells, removing NRK1 prevented NR from raising NAD+ under the tested conditions. The cells could still use nicotinamide, which relies on a different enzyme. 1

The ingredient needed a particular processing step. Having more starting material could not replace the missing machinery.

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What changes after a dog swallows NR?

A pathway drawn inside a cell does not show the whole journey from a bowl of food. Before a swallowed ingredient can contribute to a distant tissue, it passes through digestion and metabolism.

In mouse experiments, researchers used isotope labels—traceable versions of atoms—to follow NR. Delivery through a vein carried intact NR to several tissues. Given by mouth, it was metabolized to nicotinamide in the liver; other tissues could use circulating nicotinamide to make NAD+. 9

The finding explains why “NR can enter this cell pathway” and “this amount of swallowed NR reaches a dog’s muscle unchanged” are different claims. It also shows that being broken down does not necessarily mean the material has become useless: nicotinamide is itself a building material for NAD+.

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NR, NMN and nicotinamide take different routes

The difference mattered in a study of dogs with inherited muscular dystrophy. Researchers found reduced NRK2, one of the enzymes associated with using NR, in affected muscle. Another enzyme, NAMPT, was unchanged. They chose nicotinamide, or NAM, which can enter NAD+ synthesis through NAMPT. 3

NAM treatment increased muscle NAD+ in that small disease-model experiment. The researchers had selected a starting material partly because of the machinery available to process it. They did not compare NR and NAM as supplements for normally aging dogs.

NMN is a third compound: it is the molecule produced when a phosphate group is added to NR. These names are related, but replacing one with another changes the ingredient—and the experiment being discussed.

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What researchers actually tested in dogs

Beagles given NR chloride had increased levels of 1-methylnicotinamide, a breakdown product, in blood. This measurement followed what happened to the ingredient; it did not measure strength or stamina. 7

The canine work appears in EFSA’s assessment of the applicant’s unpublished reports. It provides actual NR metabolism and tolerability information, rather than a trial following older pets’ everyday function.

NR kinase adds a phosphate group to NR, making NMN. A second enzyme uses NMN to build NAD+.

The 90-day NR-E experiment used rats

Marinescu and colleagues gave a synthetic NR preparation called NR-E to Sprague-Dawley rats for 90 days, followed by a recovery period. At the highest tested exposure, male rats had a small but statistically significant reduction in body weight. The paper set different no-observed-adverse-effect levels for males and females. 2

That term describes the highest tested exposure at which the investigators did not observe an adverse effect of the specified kind. It is a safety-study finding, not a feeding instruction. The experiment used rats, and multiplying its threshold by a dog’s weight would not establish a suitable canine serving.

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What human blood tests tell us about NR

In Trammell and colleagues’ 2016 experiment, 12 people took different single doses of NR on separate visits. Researchers separated blood into cell and plasma fractions. In peripheral blood mononuclear cells—a group of immune cells—NAD+ increased at 24 hours after dosing. A related molecule, NAAD, rose earlier. 5

NAAD is another molecule within the NAD metabolic system. Its rise helped researchers detect that the system had responded to the supplement. These were chemical measurements in people, following the ingredient beyond the capsule and into measurable metabolism.

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Does a metabolic change become a physical benefit?

Researchers have tested that next step, with different results in different human populations. In a 21-day crossover trial involving 12 older men, NR changed muscle NAD-related metabolites without improving the measured mitochondrial bioenergetics—the muscle’s energy-producing processes. 6

A later trial asked a more tangible question: could people with peripheral artery disease walk farther in six minutes? Among 90 randomized participants, NR produced a 17.6-metre advantage over placebo at six months. That met the study’s prespecified, relatively permissive statistical threshold, and the authors called for confirmation in a larger trial. Adding resveratrol did not improve that result. 10

The positive walking result is interesting because it measured function. It concerns a specific human circulatory disease, however, and does not predict an extra distance on an older dog’s walk.

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Why the senior-dog cognition trial is a separate story

A 2024 canine trial tested LY-D6/2, a proprietary NAD+ precursor combined with a senolytic intended to target senescent cells. The paper did not identify the precursor as NR. Changes in owner questionnaire scores differed across groups, while activity monitors and in-house cognitive tests did not show a significant difference. 4

This is relevant to the wider study of canine aging, but it cannot tell an owner which amount of NR to buy. The formula contained more than one intervention, and the study did not isolate their contributions. Our NAD technical appendix provides the fuller study-by-study distinctions.

How much NR should a dog receive?

The studies above do not establish a universal NR dose for pet dogs. A human capsule, a research exposure and a pet product’s directions answer different questions. For an actual product, start with the directions for the dog’s size and life stage, then have the veterinarian assess the whole formula in the context of existing care.

This is particularly relevant when the reason for trying NR is a new change in movement, appetite or behaviour. Those changes need an explanation of their own. The senior-dog signs guide helps distinguish changes to discuss at an appointment from signs needing prompt attention. An ingredient guide cannot tell which of those situations applies to an individual dog.

After NR chloride, beagles had increased levels of a breakdown product in blood during a 28-day study.

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DVM Voice: Clinical Vignette of a Common Pattern in Senior Dog Aging

Case provided by JoAnna Pendergrass, DVM

Rex, a 7-year-old Labrador Retriever, was brought in after his owner noticed he was slower to rise, hesitant on stairs, and less able to play as before. Examination showed stiffness and reduced hip mobility; radiographs confirmed degenerative joint changes.

His care required weight management, veterinary-guided pain control, nutritional support, and rehabilitation — a comprehensive plan, but one started only after visible decline appeared.

Clinical takeaway: Rex’s case reflects the value of proactive aging support: maintaining lean body condition, monitoring mobility early, and supporting cellular resilience, antioxidant defense, and healthy inflammatory balance before decline becomes obvious.

Single-case vignette. Not generalizable. Veterinary oversight is essential for pain, stiffness, or suspected joint disease.

Explore Hollywood Elixir Research →
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Read the full ingredient name, including its form

NR chloride is a defined chemical form of NR. Other forms also appear in product literature: ThorneVet’s 2024 Longevity Complex document, for example, named NR hydrogen malate. That older document should not replace the current label when checking what a product contains. 8 11

The form helps connect a label to the research. A paper using NR chloride has tested that preparation; it has not compared every NR salt or finished formula. A phrase such as “advanced delivery” does not supply the missing comparison. Look for the full ingredient name and the declared amount, then distinguish those disclosures from a claim that one product reaches canine tissues more efficiently.

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Powder weight, NR amount and serving size

Hollywood Elixir’s current Supplement Facts lists 60 mg of nicotinamide riboside per 2.5 g sachet. The sachet contains 2,500 mg of total powder; 60 mg is the listed NR amount. The other ingredients account for the rest. The ingredient panel makes the distinction visible.

Now consider an illustrative chew label listing 120 mg of NR per two chews. That works out to 60 mg per chew. Comparing the headline 120 mg with 60 mg would miss the different serving denominator. Comparing whole powder weights would miss the ingredient amount altogether.

This calculation puts the labels on the same numerical basis. The product’s directions still determine how much is intended for a particular dog; the example is not a recommendation to exchange one chew for one sachet.

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How NR fits into Hollywood Elixir

Hollywood Elixir combines NR with ingredients that have different jobs in cellular biology. NR supplies material for making NAD+. CoQ10 carries electrons through the mitochondrial machinery that helps produce ATP, the molecule that powers much of a cell’s work. Cells also recycle oxidized glutathione back to its reduced form for reuse in antioxidant defenses. 1 13 14

That is the logic of our formula: consider NAD+ supply alongside energy production and antioxidant defenses. For an owner interested in those ingredients together, Hollywood Elixir puts them in one powder with their amounts disclosed. A standard 2.5 g sachet lists 60 mg of NR, 40 mg of CoQ10 and 50 mg of glutathione.

Explore the Hollywood Elixir product information for the complete formula and current dog serving guidance. Check those amounts against existing supplements when deciding whether the combined approach fits the routine. The biological rationale explains why the ingredients were selected; the cited experiments did not test the finished formula in dogs.

When two products overlap

Products marketed for different purposes can contain the same ingredient. A canine multivitamin may list niacin; an NR-containing formula may list niacin as well. They remain separate lines on the label. Hollywood Elixir, for example, declares NR and niacin individually.

The same comparison applies to CoQ10, glutathione or other ingredients supplied by more than one product. Write down the amount in each actual daily serving rather than comparing just the product names. This gives the veterinarian the total proposed intake to assess. It does not mean that every overlap is harmful, or that removing a prescribed product is appropriate.

For a dog taking medicines or eating a therapeutic diet, include those details too. That history helps assess the proposed addition and possible interactions. 12

The serving has to reach the right pet

An amount printed on a label describes what is offered, not necessarily what was eaten. If a dog leaves half a supplemented meal, the full serving has not reliably reached that dog. A note that the meal was unfinished is more accurate than recording a complete dose.

In a household with dogs and cats, feeding separately also prevents one animal from finishing the other’s supplement. Even when a product is marketed for both species, use the relevant directions for each animal. The NR for cats guide covers the distinct feline question.

Choose a format and a labelled method of administration that fit the animal’s normal meals. The aim is an ordinary, repeatable routine—not an improvised conversion from someone else’s capsule or an assumed morning-versus-evening advantage.

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What testing should tell you about an NR product

Identity, amount and unwanted contaminants are separate testing questions. Australia’s TGA specification for NR chloride illustrates the distinction: it includes methods for identifying the compound, measuring its content and checking specified impurities. It is an ingredient specification, not a certificate for a pet supplement. 8

When reading a product’s test report, match the product name and lot to the package. Then look at what was measured. A heavy-metal result does not tell you how much NR is present; an NR assay does not demonstrate a benefit for the dog. A report for a raw ingredient also answers a different question from testing the finished powder.

La Petite Labs describes its approach to product and lot documentation in quality and testing standards. That is the place to examine the company’s testing claims alongside the specific documentation available.

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What is known about ongoing NR use?

EFSA describes canine NR chloride studies lasting seven and 28 days. In the 28-day experiment, the highest exposure caused weight loss and gastrointestinal signs, prompting a dose reduction. The assessment concerned human-food uses; these short studies do not establish years of use in older dogs. 7

For ongoing use, reassess the complete formula when the dog’s medicines, diet or health change. New vomiting, diarrhoea, appetite loss or unusual lethargy warrants pausing the supplement and contacting the veterinarian with the amount and timing available.

Where NR belongs in the decision

Read the serving as carefully as the ingredient. The illustrative chew above contains 60 mg of NR, even though its two-chew panel says 120 mg. Hollywood Elixir’s 60 mg of NR sits within 2.5 g of whole powder. Keep those units attached when comparing formulas.

Then put the NR line back alongside the other ingredients. Your dog receives the complete serving, including everything that comes with the NR. That is the formula to compare with the products already in the bowl.

Hollywood Elixir lists 60 mg of NR in a 2.5 g sachet. The sachet’s total powder weight is not its NR content.

Educational content only. This material is not a substitute for veterinary advice. Always consult your veterinarian about your dog’s specific needs. These statements have not been evaluated by the Food and Drug Administration. Products mentioned are not intended to diagnose, treat, cure, or prevent any disease.

Glossary

NR: Nicotinamide riboside, a vitamin B3-related starting material cells can use to make NAD+.

NAD+: A coenzyme involved in energy metabolism and consumed in several cellular maintenance processes.

NR kinase: An enzyme that adds a phosphate group to NR, producing NMN.

NMN: Nicotinamide mononucleotide, an intermediate in NAD+ synthesis.

NAM: Nicotinamide, a related compound that can enter NAD+ synthesis through a different enzyme from NR.

Metabolite: A substance produced or changed during metabolism; its presence can help researchers follow what happened to an ingredient.

Per serving: The amount associated with the number of chews, capsules or sachets specified on the label—not necessarily one individual unit.

Assay: A test that measures the amount of a particular substance, such as NR, in a sample.

Related Reading

Aging & Senior Dog Guidance
• Dog Age Calculator
• Dog Lifespan by Breed
• Dog Dementia
• Lethargy in Dogs
• My Dog Won't Eat
• Dog Pacing At Night
• Dog Licking Paws
• Can Dogs Dehydrate

Healthy Aging Support
• NAD+ for Dogs
• NMN for Dogs
• Antioxidants Supplements for Dogs
• Best Senior Dog Supplements & Vitamins
• Rapamycin for Dogs

References

Numbered references identify the sources used for specific claims. Read the study design, species and evidence boundaries alongside each finding.

  1. Ratajczak J, Joffraud M, Trammell SA, et al. NRK1 controls nicotinamide mononucleotide and nicotinamide riboside metabolism in mammalian cells. Nature communications · 2016· DOI 10.1038/ncomms13103Study design/context: Mechanistic studySpecies/context: mouse, mammalian cellsEvidence boundary: Experimental pathway work; not canine or feline absorption, dosing, or clinical efficacy.↩ 1 · ↩ 2 · ↩ 3 · ↩ 4
  2. Marinescu AG, Chen J, Holmes HE, et al. Safety Assessment of High-Purity, Synthetic Nicotinamide Riboside (NR-E) in a 90-Day Repeated Dose Oral Toxicity Study, With a 28-Day Recovery Arm. International journal of toxicology · 2020· DOI 10.1177/1091581820927406Study design/context: 90-day oral toxicology study with recovery armSpecies/context: ratEvidence boundary: Sprague-Dawley rats, not dogs or cats. Rat toxicology cannot establish long-term pet safety or a pet serving.↩
  3. Cardoso D, Barthélémy I, Blot S, et al. Replenishing NAD+ content reduces aspects of striated muscle disease in a dog model of Duchenne muscular dystrophy. Skeletal muscle · 2023· DOI 10.1186/s13395-023-00328-wStudy design/context: Muscular dystrophy disease-model experimentSpecies/context: dogEvidence boundary: Dogs with inherited muscular dystrophy received NAM, not NR. Not healthy senior-dog or feline evidence.↩
  4. Simon KE, Russell K, Mondino A, et al. A randomized, controlled clinical trial demonstrates improved owner-assessed cognitive function in senior dogs receiving a senolytic and NAD+ precursor combination. Scientific reports · 2024· DOI 10.1038/s41598-024-63031-wStudy design/context: Randomized controlled clinical trialSpecies/context: dogEvidence boundary: Combination-specific owner-assessed cognition result; does not isolate NR or establish efficacy of another formula.↩
  5. Trammell SA, Schmidt MS, Weidemann BJ, et al. Nicotinamide riboside is uniquely and orally bioavailable in mice and humans. Nature communications · 2016· DOI 10.1038/ncomms12948Study design/context: Pharmacokinetic studySpecies/context: human, mouseEvidence boundary: Human and mouse NAD-related biomarkers; not clinical benefit or a dose for pets.↩ 1 · ↩ 2
  6. Elhassan YS, Kluckova K, Fletcher RS, et al. Nicotinamide Riboside Augments the Aged Human Skeletal Muscle NAD+ Metabolome and Induces Transcriptomic and Anti-inflammatory Signatures. Cell reports · 2019· DOI 10.1016/j.celrep.2019.07.043Study design/context: Randomized placebo-controlled crossover trialSpecies/context: humanEvidence boundary: Older men; muscle NAD-related metabolites changed without improved mitochondrial bioenergetics. Not pet outcome evidence.↩
  7. EFSA Panel on Nutrition, Novel Foods and Food Allergens. Safety of nicotinamide riboside chloride as a novel food pursuant to Regulation (EU) 2015/2283 and bioavailability of nicotinamide from this source, in the context of Directive 2002/46/EC. EFSA Journal · 2019· DOI 10.2903/j.efsa.2019.5775Study design/context: Human novel-food safety assessment including canine dossier studiesSpecies/context: dogEvidence boundary: Short beagle metabolism and toxicity studies summarized in a human novel-food assessment; not a canine efficacy trial.↩ 1 · ↩ 2 · ↩ 3
  8. Therapeutic Goods Administration. Nicotinamide riboside chloride. Therapeutic Goods Administration · 2022Study design/context: Ingredient composition specificationEvidence boundary: Not a finished product certificate or canine efficacy assessment.↩ 1 · ↩ 2 · ↩ 3
  9. Liu L, Su X, Quinn WJ, et al. Quantitative Analysis of NAD Synthesis-Breakdown Fluxes. Cell Metabolism · 2018· DOI 10.1016/j.cmet.2018.03.018Study design/context: Isotope tracing in cells and miceSpecies/context: mouse, cell linesEvidence boundary: Isotope tracing in cells and mice; does not quantify oral NR delivery to canine tissues.↩ 1 · ↩ 2
  10. McDermott MM, Martens CR, Domanchuk KJ, et al. Nicotinamide riboside for peripheral artery disease: the NICE randomized clinical trial. Nature Communications · 2024· DOI 10.1038/s41467-024-49092-5Study design/context: Randomized clinical trial in people with PADSpecies/context: humanEvidence boundary: Primary walking result used prespecified one-sided p<0.10; larger confirmation needed, not dog outcome evidence.↩
  11. ThorneVet. Longevity Complex — manufacturer document, February 2024. ThorneVet · 2024Study design/context: Legacy manufacturer product documentSpecies/context: dog, catEvidence boundary: Manufacturer’s February 2024 ingredient declaration; current formulas may differ. Not a comparative efficacy study.↩
  12. American Animal Hospital Association. Evaluating the Healthy Senior Pet. AAHA · 2022Study design/context: Senior-pet clinical assessment guidanceSpecies/context: dog, catEvidence boundary: Not an NR-specific interaction study or dosing recommendation.↩
  13. Reactome. Complex I oxidises NADH to NAD+, reduces CoQ to CoQH2. ReactomeStudy design/context: Curated human respiratory-chain reactionSpecies/context: human biochemical pathwayEvidence boundary: Curated biochemical reaction, not a supplementation or finished-formula trial.↩
  14. Reactome. GSR catalyzes glutathione (oxidized) + NADPH + H+ => 2 glutathione (reduced) + NADP+. ReactomeStudy design/context: Curated biochemical reactionSpecies/context: human biochemical pathwayEvidence boundary: Biochemical background on glutathione recycling; not evidence of an effect from an oral pet supplement.↩

FAQ

What is nicotinamide riboside for dogs?

Nicotinamide riboside, or NR, is a vitamin B3-related ingredient that cells can use to make NAD+. A product may therefore describe NAD+ support while listing NR on its ingredient panel.

Why consider an NR supplement for a dog?

NR offers a way to supply material for NAD+ synthesis. The interest is in that biological role. A dependable improvement in an older dog’s stamina or lifespan has not been established by the NR-specific canine studies described here.

How do cells use NR?

Cells can convert NR through NMN into NAD+. Swallowed NR can also be metabolized before its material reaches a tissue; the route inside a cell is not the whole digestive journey.

When should a dog be assessed before trying NR?

Have new vomiting, appetite loss, unusual lethargy or behaviour changes assessed rather than waiting to see whether a supplement helps. Discuss suitability in advance for puppies, pregnant or nursing dogs, and dogs with existing medical conditions.

How much NR should I give my dog?

Use the current pet product’s directions and have its suitability assessed for your dog. The research here does not establish a universal canine NR dose. A rat safety threshold or a human capsule strength should not be converted into a dog serving.

Can an NR formula overlap with other supplements?

Yes. An NR-containing formula may also supply niacin, CoQ10 or other ingredients already in a dog’s routine. Compare the amounts in each daily serving and include medicines in the veterinarian’s review of the proposed combination.

Has NR itself been studied in dogs?

Yes. EFSA’s assessment describes short NR chloride studies in beagles, including a 28-day experiment that measured a breakdown product in blood and assessed toxicity. These studies did not test whether older pets became more active. The separate senior-dog cognition trial used a precursor-and-senolytic combination; its paper did not identify the precursor as NR.

What should I do if my dog seems unwell after a supplement?

Pause the supplement and contact your veterinarian for new or persistent vomiting, diarrhoea, appetite loss, unusual lethargy or behaviour change. Have the full label, amount given and timing available. These details help assess what happened.

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Discover LPL-01: How This Fits Into a Larger Canine Longevity System

Aging in dogs is not driven by a single pathway. It’s the result of interacting biological systems—energy metabolism, oxidative stress, immune signaling, and structural integrity—changing over time.

This article explores one piece of that puzzle. If you want to understand how these pieces connect—and what actually moves the needle—you need to zoom out.

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