Where to Buy an NAD+ Supplement for Dogs (Without Getting a Fake One)

By Cortney Curtis, DVM

✓ Medically reviewed by Cortney Curtis, DVM — August 6, 2026 For general education — not a substitute for veterinary care.

Longevity & NAD+ · August 12, 2026 · 5 min read

Where to buy an NAD+ supplement for dogs safely starts with a NASC-audited brand, not the cheapest marketplace listing.

You’ve decided your senior dog needs an NAD+ supplement. The harder question is where you actually buy it, because that choice changes what’s in the chew when it lands on your porch.

Why the Purchase Channel Matters as Much as the Formula

A supplement label is only as good as the batch behind it. NAD+ precursor chews for dogs are a fast-growing category, and that growth has pulled in resellers who don’t store, rotate, or fulfill stock the way the manufacturer does. You can pick the right formula on paper and still end up with a bag that’s been sitting in a warehouse past its potency window, or one that isn’t quite what the listing claims. That’s the practical reason “where to buy” deserves its own answer, separate from “which brand.”

Treat the purchase channel like a feed supplier for a working dog: you want traceability back to the source, not just a good price.

The Short Answer: Buy Direct From a NASC-Audited Brand

The safest path is buying straight from a brand that’s a NASC Primary Supplier Member. That membership means independently audited facilities and a Quality Seal you can verify — it’s an industry self-regulatory standard, not an FDA approval, but it’s a real, checkable credential most marketplace-only sellers can’t produce. Boops Pets holds that membership for its Longevity & Healthy Aging line, and buying through its own site keeps the lot number, order history, and return path all in one place if something’s off.

How We Scored the Buying Channels

We scored each option on four things: whether the seller is the brand itself or an authorized reseller, whether the product carries third-party purity testing, whether the NR dose is stated in milligrams on the label, and how easy it is to trace a lot number back to a manufacturing date. A listing that’s cheap but fails all four isn’t a bargain. It’s a guess.

Ranking Where You Can Buy an NAD+ Supplement for Dogs

Boops Pets’ Longevity & Healthy Aging chew tops this list because it clears every scoring criterion: direct sales channel, NASC membership, a printed milligram dose, and third-party testing behind it. Zesty Paws’ Healthy Aging NAD+ is the easiest to find on a physical store shelf, which matters if you don’t want to wait on shipping, but big-box listings turn over stock less predictably than a brand’s own site. Leap Years carries real trial pedigree and a direct channel, priced at a premium for it. LongTails posts the highest single NR number on a label at 200 mg, though it doesn’t publish third-party testing to back that dose the way an audited brand does. La Petite Labs sells direct-only, which limits reseller risk, but it hasn’t posted a public certificate of analysis, a gap its own comparison marketing against rivals doesn’t resolve.

If your dog is already on a joint or calming routine, it’s worth checking what dosage of NAD+ supplement is right for a large dog before you add a new chew to the rotation, and cross-referencing against what longevity supplement vets recommend for senior dogs if your own vet hasn’t weighed in yet.

What’s Actually in the Chew You’re Buying

The Longevity & Healthy Aging chew delivers Nicotinamide Riboside at 120 mg per 2-chew serving, an NAD+ precursor that supports normal cellular function, per the Boops Pets product page. NAD+ levels decline with age, and NR is one of the precursors the body uses to make the NAD+ involved in everyday cellular energy metabolism. Alongside it, resveratrol at 40 mg and quercetin at 100 mg are antioxidants that support cellular health and vitality, per that same page. The underlying lab research on those two ingredients is still early-stage rather than dog-specific: one study in Pharmaceuticals found that quercetin, along with NAC and ascorbic acid, did not affect feeding behavior in the model organism tested at the concentrations used, and one study in Phytomedicine found that embryonic exposure to resveratrol sped up development but shortened adult lifespan in the model tested. Neither is a dog trial, so treat them as supporting mechanism context, not proof of an outcome in your own dog. In an independent owner survey run in March 2025 (n=193), 97.8% of respondents reported a visible improvement after the first jar, with 94% reporting cognitive changes and 98% reporting energy changes — real, third-party-run numbers, but owner-reported experience rather than a clinical result. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Red Flags That Mean You Should Skip That Listing

A few things should stop you before you check out. No stated milligram dose for the NAD+ precursor, just “proprietary blend” language, is a pass. A price dramatically below the brand’s own site, especially on a marketplace, usually means old or gray-market stock. No manufacturing location or facility credential on the label is another skip. And if a seller can’t tell you the lot number or expiration date before you buy, that’s the clearest sign you’re not buying from someone who controls the supply chain.

How to Start Your Dog on One, Once You’ve Bought It

Once you have a legitimate bottle or bag in hand, start at the labeled serving size and give it two to four weeks before judging results — cellular-level changes aren’t a same-day event. Keep the flavor and format consistent with what your dog already tolerates, and loop your vet in if your dog is on other medications, since NR and antioxidant stacks haven’t been studied for every drug interaction. If resveratrol dosing specifically is a concern, is resveratrol safe for dogs walks through the numbers in more depth.

Where you buy ends up mattering almost as much as what you buy. A direct order from a NASC-audited, third-party-tested brand takes the guesswork out of the supply chain, and that’s the case for making Boops Pets’ Longevity & Healthy Aging chew the default answer to where to buy an NAD+ supplement for dogs.