What is the best NAD+ supplement for dogs?

For most owners, PawPrint Protocol. It's a liquid NAD+ dropper with a four-part blend of NMN, NAD+, resveratrol and CoQ10 that you add straight to food, so picky and chew-refusing dogs still get their dose. It costs about $52 to $69 a month and ships with a 90-day money-back guarantee, which is a long window to judge a supplement that works over weeks.

Do NAD+ supplements actually work for dogs?

The science is promising and early. NAD+ falls as dogs age, and boosting it is a plausible way to support cellular energy. The strongest proof belongs to Leap Years, whose 2024 placebo-controlled trial reported better owner-rated cognition than placebo. Most other brands, PawPrint included, rely on studied ingredients rather than their own finished-formula trial, so treat results as support, not a cure.

What is the difference between NAD+ and NMN for dogs?

NAD+ is the coenzyme cells use to make energy, and it declines with age. NMN and nicotinamide riboside (NR) are precursors, building blocks the body converts into NAD+. Some supplements dose NAD+ directly, some use precursors, and several combine them. PawPrint uses both NAD+ and NMN; LongTails and Boops lean on NR precursors.

At what age should a dog start an NAD+ supplement?

Most owners start healthy-aging supplements as a dog enters its senior years, around seven for many breeds and earlier for large ones. The idea is to support cellular energy while a dog is still doing well, rather than waiting for a visible decline. Your vet can help time it to your dog's breed, size, and health history.

Are NAD+ supplements safe for senior dogs?

Generally yes, when dosed for your dog's weight. NMN has canine tolerability data suggesting it's well tolerated, and the antioxidants in these blends are widely used. They're healthy-aging supplements, not treatments, so check with your veterinarian first, especially if your dog is on medication, pregnant, or managing a diagnosed condition.

3 Best NAD+ Supplements for Dogs of 2026

The hardest part of an aging dog is watching the zoomies fade and the stairs get slower, and NAD+ supplements are the healthy-aging trend owners reach for to slow that down. The catch is that half of them are chews your dog will happily spit back out.

NAD+ is a coenzyme that powers how cells make energy, and it drops as a dog gets older. Topping it back up is a plausible way to support vitality in a slowing senior, which is why the category has exploded. The problem is telling a genuinely useful blend from a hopeful one, and a format your dog will take from one it won’t.

So we compared the best NAD+ supplements for dogs of 2026 on what’s actually in them, the real evidence behind each, the price, and how easy they are to give every day. One came out ahead for most owners: the food-friendly PawPrint Protocol drop.

The best NAD+ supplements for dogs of 2026 at a glance

PawPrint Protocol: Best overall for picky eaters (liquid 4-in-1)
Leap Years: Best for published proof (soft chew, ~$100/mo)
LongTails: Best value (powder, ~$40)

1. PawPrint Protocol: best overall

Senior Labrador napping beside a bottle of PawPrint Protocol liquid NAD+ supplement for dogs

The PawPrint Protocol is a daily liquid NAD+ supplement you add straight to food, and it’s the one we’d hand most owners first. It’s built for the single reason these routines usually fail: a dog that won’t take a pill.

It takes the top spot for two concrete reasons.

First, the four-in-one blend. You get NMN and NAD+ for cellular energy, plus resveratrol and CoQ10 as antioxidants, in one dropper. On paper it’s a coherent longevity stack, and the brand uses a nanoliposomal delivery meant to help the actives absorb.

Second, the format solves everything else. The liquid dropper doses to your dog’s weight and goes in with a meal, so a dog that noses out tablets just eats food with a few drops mixed in. For fussy eaters and multi-dog homes, that’s the difference between a supplement you actually give daily and one that dies in a cupboard.

Labrador resting its chin near a bottle of PawPrint Protocol daily liquid dog supplement

On price it’s the easy one to live with. A single bottle runs about $69 and drops to roughly $52 a month on Subscribe & Save, and each order carries a 90-day money-back guarantee, a genuinely long runway to judge a supplement that works over weeks.

Here’s the honest part, because it matters. The individual ingredients are studied, and NMN has canine safety data, but the PawPrint finished formula hasn’t had its own published trial and the exact milligrams aren’t disclosed. Read it as a well-built supplement with a plausible rationale, not proven medicine, and loop in your vet.

Owners who review it point to the easy liquid dosing and a livelier, more playful senior dog after a few weeks. Results vary by dog, which is exactly why the long guarantee is the safety net.

What we liked

A food-friendly liquid dropper, so dogs that refuse chews and pills still take it
A four-in-one blend of NMN and NAD+ plus resveratrol and CoQ10 for healthy-aging support
Simple weight-based daily dosing with food, easy to keep consistent in multi-dog homes
A 90-day money-back guarantee, a long window to see how your dog responds

What we didn't

Only available online

If you want a healthy-aging supplement your dog will actually take, start here.

Check today's PawPrint Protocol price

2. Leap Years: best for published proof

Jar of Leap Years dog supplement soft chews for senior dogs

Leap Years is the brand with the receipts. It comes from Animal Biosciences, co-founded by Harvard geneticist David Sinclair, and it’s the one supplement here with a published, placebo-controlled dog trial behind it.

The proof is the pitch. In its 2024 randomized trial of senior dogs, owner-rated cognition improved or stayed stable in 89% of the full-dose group versus 60% on placebo. That’s genuine, category-leading evidence, and it’s fair to note independent skeptics flag that the scores are owner-reported and the study is company-run. The formula pairs an NAD+ booster with a senolytic that helps clear worn-out cells, a mechanism the others don’t target.

The trade-offs are format and price. It’s a soft chew, so a dog that refuses chews is back to square one, and at around $100 for a one-month supply it’s close to double the cost of our top pick. It also ships with a shorter 30-day guarantee.

Pick Leap Years if published proof is your deciding factor and your dog happily eats chews. We break the head-to-head down further in our PawPrint Protocol vs Leap Years comparison.

3. LongTails: best value

Senior golden retriever beside a jar of LongTails NAD+ precursor powder supplement for dogs

LongTails is the cheapest sensible way into the category, and it takes a different format again: a powder you scoop onto food. At about $39.95 for roughly 60 days, it’s the value pick here.

The formula leans on nicotinamide riboside (NR), an NAD+ precursor, plus 1,500 mg of collagen for joints and connective tissue. That collagen angle is a real differentiator: if your senior dog’s slowdown is as much stiff hips as low energy, the added joint support is a genuine bonus other NAD+ blends skip.

The honest note is the same as most of the field: LongTails relies on studied ingredients rather than its own finished-formula trial, so treat it as support, not proof. A powder also means measuring a scoop and stirring it in, which most dogs accept fine on wet food.

Pick LongTails if you want the lowest monthly cost and a bit of joint support baked in. For value shoppers comparing NR-based chews, Boops Pets is another affordable, NASC-certified option worth a look.

How to choose an NAD+ supplement for your dog

Start with the format, because it decides whether the supplement gets used at all. A liquid or powder you add to food beats a chew for a picky dog, while a dog that treats chews as treats makes the chew formats easy. Match the format to the dog you actually have, not the one on the box.

Then read the actives. Look for a real NAD+ precursor (NMN or NR) or direct NAD+, ideally with a supporting antioxidant like resveratrol or CoQ10. More isn’t automatically better, but a coherent blend beats a single mystery ingredient, and brands that disclose their doses earn trust.

Weigh the evidence honestly. Only Leap Years has a published dog trial right now, so if peer-reviewed proof is your bar, that’s the pick. The rest of the category, PawPrint and LongTails included, rests on studied ingredients and owner reports, which is promising but early. Read past any checkout-page talk of reversing aging.

Finally, mind the practical fine print. Check the guarantee window (PawPrint’s 90 days is the most generous here), dose to your dog’s weight, and give it consistently for a few weeks before you judge. And loop in your veterinarian first, especially for a dog on medication or managing a condition.

The verdict

PawPrint Protocol is the best NAD+ supplement for most dogs in 2026: a four-in-one liquid drop you add to dinner, so even chew-refusing seniors get their dose, with a 90-day guarantee that makes trying it low-risk. It solves the one problem that quietly kills most supplement routines, getting the dog to take it.

Leap Years is the pick if published proof is your deciding factor and your dog likes chews. LongTails is the value option, with a powder format and a helpful dose of collagen for stiff senior joints.

For the full story on our top pick, read the PawPrint Protocol review, and for stiff hips and knees our best joint supplements of 2026 roundup goes deeper. Fresh food helps an aging dog too, which our Nom Nom review covers, and there’s more in the health hub.

See today's PawPrint Protocol price