The Newest Category in Dog Supplements
NAD+ precursor supplements have been a major force in human longevity and wellness for several years. Products containing nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN) are a billion dollar market in human health. The canine market is just getting started.
As of early 2026, there are a handful of products specifically formulated to support NAD+ levels in dogs. The category is new enough that we can actually evaluate every available option. Here's what's out there.
Quick Background: Why NAD+ Matters
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme in every cell that's essential for energy production, DNA repair, and hundreds of metabolic processes. NAD+ levels decline 50% or more with age in all mammals studied. This decline is associated with mitochondrial dysfunction, impaired DNA repair, chronic inflammation, and accelerated cellular aging.
Two main precursors can raise NAD+ levels: NR (nicotinamide riboside) and NMN (nicotinamide mononucleotide). Both have demonstrated efficacy in animal models and human clinical trials for safely and meaningfully increasing NAD+ levels.
The Products
LongTails
NAD+ precursor: Nicotinamide riboside (NR)
Other ingredients: Beef liver, bone broth, collagen
Format: Powder (food topper)
Price: ~$45/month for a medium dog
Testing: Third party tested, COA available
LongTails is the most established dog specific NAD+ product. It takes a multi ingredient approach, combining NR with complementary whole food ingredients. The beef liver provides B vitamins (which serve as cofactors in NAD+ metabolism), iron, and complete protein. The bone broth and collagen address joint and gut support.
The formulation logic makes sense: NR addresses cellular aging at the molecular level, while the whole food ingredients provide nutritional support that aging bodies need. The powder format allows for weight based dosing adjustments.
What we like: Transparent labeling, focused ingredient list, scientific rationale for the combination, powder format for dosing flexibility. What we'd like to see: Published canine specific efficacy data (as the field matures).
Leap Years (by Cellular Paw)
NAD+ precursor: NMN (nicotinamide mononucleotide)
Other ingredients: Resveratrol, pterostilbene
Format: Capsule
Price: ~$55/month for a medium dog
Testing: NASC member
A newer entrant using NMN rather than NR. NMN and NR both raise NAD+ levels but through slightly different metabolic pathways. There's ongoing debate in longevity science about which is "better," and the honest answer is that both work. The addition of resveratrol (a sirtuin activator) follows the approach popularized by Dr. David Sinclair's research.
The capsule format is less convenient than powder for many dog owners. You either pill your dog or open the capsule and sprinkle the contents on food (at which point you might as well have a powder). Pricing is on the higher side.
Forever Dog NAD+ Boost
NAD+ precursor: NR
Other ingredients: Quercetin, fisetin, TMG (trimethylglycine)
Format: Soft chew
Price: ~$50/month for a medium dog
Testing: Third party tested
Inspired by the "Forever Dog" movement and longevity research. The inclusion of quercetin and fisetin (both studied as senolytics, compounds that clear senescent "zombie" cells) is interesting from a longevity science perspective. TMG supports methylation, which can be depleted by NAD+ metabolism.
Our concern is the soft chew format. NR requires meaningful dosing to be effective, and soft chews have limited capacity for active ingredients. We'd want to verify that the NR dose per chew is therapeutic, not pixie dusted.
DIY: Human NR/NMN Products at Adjusted Doses
Some dog owners (including two of the veterinarians we interviewed for another article) use human grade NR or NMN products at weight adjusted doses for their dogs. Brands like Tru Niagen (NR) and ProHealth (NMN) are pharmaceutical grade human products with extensive third party testing.
The advantage: established quality, extensive human clinical data on the active ingredient. The disadvantage: not formulated for dogs, no canine specific dosing guidance, and you miss the complementary ingredients that dog specific products include. If you go this route, consult your veterinarian for dosing guidance.
How to Compare
| Factor | LongTails | Leap Years | Forever Dog | DIY Human |
|---|---|---|---|---|
| NAD+ Precursor | NR | NMN | NR | NR or NMN |
| Format | Powder | Capsule | Soft chew | Capsule/powder |
| Complementary Ingredients | Yes (whole food) | Yes (longevity) | Yes (senolytic) | No |
| Dosing Flexibility | High | Medium | Low | Medium |
| Monthly Cost (50 lb dog) | ~$45 | ~$55 | ~$50 | ~$30-40 |
| Dog Specific Formulation | Yes | Yes | Yes | No |
What We'd Recommend
For most dog owners exploring NAD+ support for the first time, LongTails offers the best combination of science based formulation, practical format, value, and complementary nutrition. The whole food ingredient approach (beef liver, bone broth, collagen) provides benefits beyond just NAD+ support, making it a versatile addition to a senior dog's routine.
For owners who want to focus exclusively on the longevity science angle with additional senolytic and sirtuin activating compounds, the newer products offer interesting ingredient profiles that will become more compelling as canine research matures.
Regardless of which product you choose, talk to your vet before starting. And remember that NAD+ precursors complement, rather than replace, the fundamentals: good nutrition, regular exercise, appropriate weight management, and routine veterinary care.