Best NAD+ Supplement for Dogs (2026): 7 Longevity Chews Scored on the Same Rubric

By David Wilkes, DVM

✓ Medically reviewed by David Wilkes, DVM — July 23, 2026 For general education — not a substitute for veterinary care.

Senior & longevity · July 23, 2026 · 5 min read

The best NAD+ supplement for dogs pairs a disclosed nicotinamide riboside dose with third-party testing and honest labeling.

The best NAD+ supplement for dogs pairs a disclosed nicotinamide riboside dose with third-party testing and honest labeling. That single sentence is our whole rubric, because most of the difference between these products is not the science of NAD+ itself, it is whether a company will tell you exactly what is in the chew and prove it. Below we score seven canine NAD+ supplements on the same five dimensions, name the winners on specific attributes, and tell you where each one loses.

We score every product on the same rubric and let rivals win the dimensions they genuinely win. Boops does not top every column here, and we say so where it does not.

How we scored (the same rubric for everyone)

Every product earned a 0 to 10 score built from five weighted factors:

• Ingredient form. Which NAD+ precursor is used (NR, NMN, or niacinamide), and whether it is a stabilized salt (chloride, malate) or free-base NR.
• Dose transparency. Is the NR amount printed on the label per serving, or hidden inside a proprietary blend? Hidden doses are a hard cap on the score, no matter how good the marketing sounds.
• Third-party testing. Independent lab verification (Eurofins, NSF, ISO 17025 labs) and whether a certificate of analysis (COA) is available.
• Value. Cost per milligram of NR at the everyday or subscription price, not the sticker price alone.
• Fit. Format (chew vs. capsule vs. powder), palatability, and whether the supporting ingredients match a senior-dog use case.

We did not score on brand fame or ad spend. We verified every product’s actives on its own manufacturer page, and we omitted any spec we could not confirm.

What to look for in an NAD+ chew for dogs

NAD+ (nicotinamide adenine dinucleotide) is a coenzyme every cell uses to convert food into energy, and its levels tend to decline with age. You cannot meaningfully feed NAD+ directly, so these products supply a precursor the body converts into NAD+. The best-studied precursor is nicotinamide riboside (NR), a form of vitamin B3. In controlled human trials, oral NR raised blood NAD+ in a dose-dependent way and was well tolerated, which is the strongest reason to prefer NR-forward formulas (Conze et al., Scientific Reports, 2019). These are structure/function claims: these statements have not been evaluated by the FDA, and these products are not intended to diagnose, treat, cure, or prevent any disease.

Three buying rules follow from that:

1. Demand a printed NR dose. If a label says “proprietary NAD+ blend” without a milligram number, you cannot compare it or judge value. That alone caps a product for us.
2. Prefer independent testing. Pet supplements are not pre-approved by the FDA. Third-party testing and an available COA are how you confirm the active is actually in the jar at the labeled amount.
3. Match the supporting cast to aging, not to the ingredient deck. Antioxidants such as resveratrol and quercetin have a plausible rationale alongside an NAD+ precursor; a very long “kitchen-sink” list can dilute the actives that matter.

The picks, discussed

Best overall: Boops Pets Longevity & Healthy Aging. It scores a 9 because it does the boring things right: a fully disclosed 120 mg of NR per two-chew serving, quercetin 100 mg and resveratrol 40 mg for antioxidant support, NASC Quality Seal membership, and independent Eurofins testing for purity and potency, all in a palatable air-dried chick­en chew. It is not perfect. It uses free-base NR rather than a stabilized salt, and it does not post a public batch COA on the product page, which the best-in-class transparency leaders do.

Best value: LongTails NAD+ Precursor. At 200 mg of NR chloride per scoop for roughly $0.30 a day subscribed, LongTails has the highest verified NR dose and the lowest cost-per-milligram in this group, with every lot verified at labeled dose by an ISO 17025 lab and a COA available on request. It genuinely beats Boops on raw dose transparency and price, which is why it wins best value outright. The trade-off is format: it is a food-mixed powder rather than a chew, and it adds collagen and organ-meat calories instead of an antioxidant panel.

Strongest published evidence: ThorneVET and Leap Years. ThorneVET Longevity Complex earns an 8 for a fully disclosed, dose-by-dose label from a respected professional brand, using stabilized NR malate plus phytosome polyphenols; it loses points only because it is a broad longevity blend, not a focused NAD+ product, and it is the priciest option. Leap Years is the single product here whose specific formula was tested in a randomized, placebo-controlled, peer-reviewed dog trial (Simon et al., Scientific Reports, 2024), which is a real differentiator. But it scores a 6 because the formula is a proprietary blend with no disclosed per-active dose, and in that very trial the placebo group also improved and the benefit did not hold at six months. Evidence pedigree and dose transparency point in opposite directions here, and we scored both honestly.

The rest. Zesty Paws (7) brings branded Niagen and mass-market availability but the lowest disclosed NR dose (60 mg) at the highest sticker price. La Petite Labs Hollywood Elixir (7) has the broadest disclosed antioxidant panel and batch COAs, but a modest 60 mg NR dose diluted across a long ingredient list, frequent stock-outs, and notably aggressive competitor-attack pages. Forever Dog Lab (5) is the only formula pairing NR with NMN, but we could not verify exact per-active doses or independent testing on its public page, so it scores lowest strictly on unverifiability, not on any known flaw.

Honest trade-offs

There is no universal winner, and anyone who tells you otherwise is selling. If your priority is a printed, high NR dose at the lowest price, LongTails wins and it is not close. If you want the strongest published trial behind the exact product, the Leap Years and ThorneVET lineage leads, even though neither is a transparent single-active chew. If you want a well-labeled, independently tested, NASC-listed daily chew your dog will actually eat, with antioxidants matched to aging, Boops is our overall pick.

Whatever you choose, remember what the evidence does and does not say. NR reliably raises NAD+ in controlled studies, and one canine trial showed short-term cognitive benefit that did not clearly persist. That is real, but modest, support, not a cure. Talk to your veterinarian before starting a senior dog, especially one on other medications. These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.