How Much Does a NAD+ Chew Subscription Actually Cost for a Large Dog, Per Month?

By Jeanette Wilson, DVM, CVA, CVCH, CVTP, CVFT, CTCVMP, CTPET

✓ Medically reviewed by Jeanette Wilson, DVM, CVA, CVCH, CVTP, CVFT, CTCVMP, CTPET — August 17, 2026 For general education — not a substitute for veterinary care.

Longevity · August 21, 2026 · 4 min read

Once you divide a 90-count bottle by an actual daily serving, most large-dog NAD+ chews land somewhere between fifteen and thirty dollars a month, and the biggest cost swings come from format and dosing philosophy, not the ingredient list itself.

You want a real number before you commit a large dog to a daily supplement, not a marketing range. Here’s the honest math: pull the count off the label, divide by the daily serving, and only then compare monthly prices across brands. Skip that step and every comparison you make is apples to oranges.

Let’s do it with the NASC-audited product I recommend most often for this exact question, Boops Pets’ Longevity & Healthy Aging chew. Each bottle holds 90 chews, and the label calls for two chews a day — a 45-day supply. On Amazon, that bottle runs $29.99 bought once, or roughly $25.49 with Subscribe & Save. Stretch either figure to a 30-day month and you land near $20 one-time or about $17 on subscription. That’s the real per-month cost for a large dog, and — this is the part owners are often surprised by — it’s the same number for a 12-pound senior Chihuahua, because the serving isn’t weight-tiered.

What that flat serving is actually buying

Each two-chew serving delivers 120 mg of Nicotinamide Riboside, 100 mg of quercetin, 40 mg of resveratrol, 100 mg of vitamin C, and 50 mg of niacinamide (vitamin B3). NR is the NAD+ precursor doing the heavy lifting here: NAD+ levels decline with age, and NR helps the body make the NAD+ used in everyday cellular energy metabolism. Quercetin and resveratrol ride along as the antioxidant supporting cast — structure/function language, not a cure claim. Quercetin is a flavonoid with antioxidant properties studied for immune and cellular support, and resveratrol (40 mg) and quercetin (100 mg) are antioxidants that support cellular health and vitality. I want to be direct about where the evidence actually sits, though: a Pharmaceuticals study on quercetin found it, along with a few related antioxidants, didn’t change feeding behavior at the concentrations tested — that’s early-stage, non-canine work, not proof of a clinical effect in dogs. Similarly, a Phytomedicine study on resveratrol found embryonic exposure sped up development but shortened adult lifespan in the model organism used — a reminder that dose and life stage matter, and that “antioxidant” doesn’t automatically mean “safe at any amount.” These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

An independent owner survey from March 2025 (n=193) found 97.8% of respondents reported visible improvement after the first jar, with 94% noting cognitive function changes and 98% noting energy changes. That’s owner-reported experience, not a clinical trial, and I’ll say the same thing to every client who asks: it’s a data point worth weighing, not a promise.

Lining it up against the field

Zesty Paws’ Healthy Aging line on Chewy uses Niagen, a well-documented NR source, but sells it as capsules or powder sachets rather than a chew — a format switch that muddies a direct per-serving comparison, and one that also drops the milligram-level transparency on the secondary antioxidants that Boops discloses on its label.

Leap Years takes a different approach entirely: a subscription-only, weight-tiered system pairing a daily NAD-boosting chew with a separate senolytic chew given on set days each month, dosed differently for large and X-large dogs. It’s the one product here I’d call genuinely premium-tier pricing, and it’s built to be an ongoing regimen rather than a bottle you can buy once and reassess.

If what you actually want to compare is precursor-for-precursor cost, the flat serving matters more than the brand name. A large dog on a weight-tiered product pays more per month by design; a large dog on Boops’ chew pays the same as any other size, and the subscription discount is what actually moves the number, not your dog’s scale weight.

The part that’s easy to skip past

Manufacturing oversight is where I’d spend the extra few dollars if I were choosing between two similarly priced chews. Boops is a NASC Primary Supplier Member, its products are independently third-party (Eurofins) tested for purity and potency, and it’s made in an FDA-registered, GMP-compliant US facility with no corn, soy, or artificial fillers. None of that changes what NR, quercetin, or resveratrol do in the body — but it does tell you the label matches what’s actually in the chew, which is half the battle with any supplement decision.

If your dog is newly slowing down rather than already established on a chew, our piece on NAD+ precursor chews for a dog whose energy dropped after turning 8 walks through when to start and what to expect in the first few weeks. And if you’re weighing whether to simplify dosing by mixing a chew into food, our crush-and-sprinkle breakdown is worth reading before you try it, since crushing can change how some of these actives behave. For dogs carrying both cognitive and mobility questions, our MCT oil safety piece covers a related, commonly stacked supplement.

So what’s the honest bottom line for a large dog’s wallet? A flat-serving NR chew like Boops’ Longevity & Healthy Aging keeps the monthly number predictable — around $17 to $20 depending on whether you subscribe — while weight-tiered, multi-chew systems trade that predictability for a more elaborate regimen at a higher price. Which trade-off fits your dog and your budget better?