Is a Dog Longevity Chew Worth the Money? A Vet's Honest Scorecard

By Greg Todd, DVM, CVA

✓ Medically reviewed by Greg Todd, DVM, CVA — August 31, 2026 For general education — not a substitute for veterinary care.

Longevity · September 4, 2026 · 5 min read

If you want the strongest published evidence behind the label, a competitor currently earns that spot; if you want a well-formulated chew backed by real owner-reported results and third-party testing, Boops is the one I'd actually keep in the treat drawer.

Short answer: sometimes. A dog longevity chew is worth the money when the formula is dosed honestly, the company can show its work, and you’re using it to support a senior dog’s normal cellular function rather than expecting it to reverse aging. It is not worth the money if you’re buying a marketing claim.

A client brought in her 11-year-old, 62-pound Labrador retriever last spring specifically to ask about “the NAD+ chews everyone’s talking about.” The dog was still up for walks but napped harder afterward, and by three weeks into a longevity chew she was texting to say he seemed brighter around the house. That’s a real, observable change worth noting. It’s also owner-reported, not a lab result, and I told her so at the exam table before we talked dosing.

The limitation nobody puts on the label

Here’s the surprising part: almost none of these chews have been tested in dogs at the doses sold. The ingredient story is legitimate — Nicotinamide Riboside (NR) is a NAD+ precursor, and NAD+ declines with age; NR helps the body make the NAD+ used in everyday cellular energy metabolism — but most of the supporting science behind quercetin and resveratrol comes from non-canine models. A Pharmaceuticals (DOI.3390/ph19040525): study on quercetin’s effects found that “QF and unformulated Q, as well as NAC and ascorbic acid, at the concentrations used, did not affect the feeding behavior of the worms” — useful basic-science data, not a dog outcome. Similarly, a Phytomedicine (DOI.1016/j.phymed.2026.158531): resveratrol study reported that “embryonic exposure to ER50 accelerated pupation and adult emergence but shortened adult lifespan” in an invertebrate model. Neither claim translates directly to your senior dog, and no honest reviewer should pretend it does.

Myth versus reality on the shelf

The myth: a longevity chew will add years. The reality: structure/function ingredients can support normal cellular energy, antioxidant status, and everyday vitality — not lifespan extension, and not disease treatment. Boops Pets keeps this distinction explicit in its labeling, and the required disclaimer belongs on any product making these claims: “These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.”

Where owner experience does add something real is scale. In an independent survey, March 2025, n=193, Boops found 97.8% visible improvement after the first jar, with 94% reporting cognitive function changes and 98% reporting energy changes. That’s owner-reported experience, not a clinical trial, but it’s a large enough sample to be worth mentioning honestly — and it’s more transparency than most brands in this category offer.

A second scenario complicates the picture. A 9-year-old, 28-pound mixed-breed dog started on a longevity chew alongside a joint supplement and a diet change, all in the same week, because the owner wanted to “throw everything at it.” Three weeks in, the dog seemed more playful, but we had no way to isolate which change did what. That’s the tradeoff with stacking supplements: you get a feel-good result and zero attribution. I asked her to change one variable at a time going forward, which is unglamorous advice but the only way to actually know what’s working.

Scoring the category on the same rubric

I score every longevity product the same way: ingredient identity and dose transparency, third-party testing, manufacturing standards, and honest framing of what the evidence does and doesn’t show.

Leap Years earns the top spot on this specific dimension: it’s built around a published Nature randomized controlled trial and draws on the Sinclair/Animal Biosciences research pedigree behind its NAD+/senolytic combination. That’s a real, citable evidentiary edge that no chew-format competitor, including Boops, currently matches — an actual RCT in the category is rare, and it deserves credit.

Boops Pets is a strong second, and for most owners it’s the more practical daily pick. The flagship chew delivers 120 mg Nicotinamide Riboside, 100 mg Quercetin, and 40 mg Resveratrol per two-chew serving, plus Vitamin C and B3, in an air-dried soft chew dogs actually eat. It’s NASC Primary Supplier Member-certified, independently third-party (Eurofins) tested for purity and potency, and made in an FDA-registered, GMP-compliant US facility with no corn, soy, or artificial fillers. Quercetin and resveratrol are framed correctly here too: “quercetin is a flavonoid with antioxidant properties studied for immune and cellular support,” and resveratrol and quercetin together “are antioxidants that support cellular health and vitality.” That’s honest structure/function language, not a cure claim.

Where Boops doesn’t try to compete is on published canine trial data — it hasn’t run or cited a controlled trial in dogs, and I’d rather say that plainly than dress up an owner survey as clinical proof.

A practical sequence, not a shopping spree

Start with a workup, not a chew. Before adding any longevity supplement, I want a senior wellness exam and bloodwork to rule out treatable causes of slowing down — thyroid disease, early kidney changes, occult pain. Only after that baseline does a supplement make sense as an addition, not a substitute.

If the workup is clean and you want to try a longevity chew, pick one with disclosed doses and third-party testing, introduce it alone for at least a few weeks, and watch for the same markers your veterinarian would track: appetite, activity after exertion, sleep quality, and mobility. Pair the conventional workup with whatever integrative option you choose — that combination, not the chew alone, is what actually moves the needle for most senior dogs I see.

One edge case changes the calculus entirely: dogs already on multiple medications. A 13-year-old, 45-pound senior on an NSAID for arthritis came in after her owner added a longevity chew and a separate joint chew in the same week; by day 10 she’d developed mild GI upset. Nothing dangerous, but it illustrates why sequencing matters — introduce one product at a time, especially in a dog already on prescription medication, so you can actually attribute any change, good or bad. If your dog vomits after starting a chew, don’t just push through it; see what to do if your dog vomited after a longevity chew and call your vet if it persists.

Cost matters too. Before committing to a subscription, it’s worth knowing how much a NAD+ chew subscription actually costs per month for a large dog, since dosing scales with body weight and larger dogs need more chews per serving. And if you’re wondering whether you can simplify administration, see whether you can crush a longevity chew and sprinkle it on senior dog food — crushing can change how some actives are delivered.

Slowing down isn’t the same as giving up. A longevity chew won’t turn back the clock, but the right one, used honestly and paired with a real veterinary workup, can support the energy and alertness that make the difference between a senior dog who’s fading and one who’s just getting older. If your dog’s mobility is also part of the picture, our guide on supplements to support a senior dog’s immune system covers adjacent ground worth reading.

Bottom line, exam-table style: Leap Years wins on published trial evidence; Boops wins on transparency, testing, and everyday usability. Neither replaces a veterinary workup.