Puppy Harbor Vitality NAD⁺ - Dog Longevity Chew
Puppy Harbor Vitality NAD⁺ - Dog Longevity Chew
Restores cellular energy & vitality
Reduces morning stiffness & joint pain
Sharpens cognitive recognition
Real chicken soft chew dogs love
Brings back the puppy spark
Clinically dosed ingredients
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60-Day Guarantee
60-Day Guarantee
We offer a full 60-day money-back guarantee.
Try Puppy Harbor Vitality daily for 60 days. If you don’t feel a meaningful difference in how your dog moves, plays and acts, email us and we’ll refund your order.
No complicated process. No stress. Just a simple, risk-free way to see whether it’s a fit for you.
How To Use it
How To Use it
It depends on your dog's weight. Start with half the amount below for the first week or two so his stomach can adjust, then build up to the full daily serving. You can give it all at once or split it between morning and night.
- Up to 25 lbs: 1 chew a day
- 26 to 50 lbs: 2 chews a day
- 51 to 75 lbs: 3 chews a day
- Over 75 lbs: 4 chews a day
Vitality works at the cellular level, so give it time. Most owners allow 4 to 6 weeks for it to build up before they see the difference.
The Science Behind It
The Science Behind It
Every cell in your dog's body runs on a molecule called NAD+. It powers the energy his cells make and the repair work that keeps them healthy. Starting in middle age, NAD+ levels fall, and that decline shows up as the slowing, stiffening and graying you have been noticing.
Vitality gives his body the raw materials it uses to rebuild NAD+, then adds support for his joints, brain and antioxidant defenses. In a published study of senior dogs, an NAD+ precursor and senolytic combination improved owner-rated signs of aging over several weeks.
The point is to support the cause of the slow-down, not just the symptoms, in a daily chicken chew he treats like a snack.
Shipping & Returns
Shipping & Returns
Tracked shipping on all orders.
Orders typically dispatch within 24–48 business hours.
$4.50 flat-rate shipping, and most orders arrive within a 7-12 business days.
Every order ships from our facility with full tracking.
If you need help with your order, our support team is easy to reach and happy to help.
Is It Safe?
Is It Safe?
Yes. Vitality is vet-formulated and made in a GMP, FDA-registered facility, with every batch made to label.
Most dogs do great from the first chew. A few may have a brief, mild tummy adjustment in the first days, so introduce it gradually and give it with food if he has a sensitive stomach.
If your dog is on medication or has a health condition, check with your vet before starting, since a couple of the botanical ingredients can interact with certain prescriptions.
Ingredients
Ingredients
Seven active ingredients, chosen to support healthy aging from several angles at once:
- Nicotinamide riboside, for NAD+ and cellular energy
- Vitamin B3 (niacinamide), a second route to NAD+ and DNA repair
- Resveratrol, to help switch on longevity (sirtuin) pathways
- Quercetin, studied for clearing worn-out 'zombie' cells
- Glucosamine, for cartilage and joint comfort
- Betaine, to support healthy methylation
- Vitamin C, for antioxidant and connective-tissue support
All in a real chicken soft chew, with no unnecessary fillers. Scroll down to tap any ingredient and see the research behind it.
Frequently Asked Questions
Frequently Asked Questions
Isn't he just getting old?
Partly. But the slowing down has a real cause: with age, his cells make less NAD+, the molecule behind energy and repair. Vitality gives his body what it needs to make more of it again.
Why a chew instead of liquid drops?
NAD+ breaks down fast once it's dissolved in water, so liquid drops lose potency from the day the bottle is opened. A dry chew keeps the actives full-strength until your dog eats it, with a precise dose every time and a chicken flavor he actually wants.
How long until I see a difference?
Most owners notice a shift around weeks 3 to 4: more spark, more interest in walks, easier on his feet. It builds over 6 to 8 weeks.
How much do I give him?
Dosing is by weight: smaller dogs get fewer, larger dogs up to about 4 a day. One jar is a one-month supply. Give it with or without food.
What you should expect from giving Vitality NAD+ daily
This is not a painkiller that masks a bad day. It works at the cell level, so the changes arrive in a predictable order.
Vitality gets to work immediately
Every chew feeds NAD+ precursors into his bloodstream and down to the cells where his body actually produces energy. That is the level where aging begins, and it is the level a joint treat never reaches.
The First Thing You'll Notice
- He takes it like a treat, so no pill pockets and no wrestling
- Chicken flavour, soft chew, gone in seconds
- Ten seconds a day and you are done
His spark starts coming back
His NAD+ levels have been climbing every day for three weeks. Cellular energy is the first thing to return, and it shows up in the small behaviours you had quietly stopped expecting.
You Start Seeing Him Again
- More interest in walks and more noise at the front door
- Getting up off the floor looks easier
- He brings you a toy for the first time in months
It's working deeper
Two months in, the senolytic side of the formula has had time to do its job. Quercetin and resveratrol help clear out worn-out cells, while glucosamine and Vitamin C support the joints carrying him around all day.
Everything Is Compounding
- Stiffness after a long nap keeps easing off
- Steadier on the stairs and getting into the car
- Brighter eyes, fuller coat, more presence in the room
More good years
Three months of consistent daily use has built something a bag of joint treats never could. His cells are running closer to the way they ran when he was younger, and every month you keep going protects the ground you have both gained.
What You've Been Working Towards
- Energy that holds through the whole walk
- Sharper, more switched on, more himself
- The dog you remember, back in the room
60-day money-back guarantee. If you don't see the change, you don't pay for it.
Noticed more energy
Moving more easily
Seemed more themselves
Would recommend
Finally, A Real Way
To Fight His Aging.
A multi-pathway daily chew with nicotinamide riboside, resveratrol, quercetin, glucosamine, betaine and more. The full system to refill his cellular fuel and bring back the dog you remember.
Puppy Harbor Vitality NAD+
If your dog has slowed down more than he used to, you're not imagining it. The slower mornings, the lag on walks, the gray creeping in, the way he just seems less himself, these are all signs his cells need better support. Vitality was built to refuel his cellular energy, joints and mind in one simple daily chew.
Slowing Down
Stiff Joints
Cloudy Eyes
Less Playful
Sleeping More
Graying Early
Every Ingredient Carefully Chosen
Seven actives that work in phases to support healthy aging at the cellular level. Tap any ingredient to see the research.
Nicotinamide Riboside
Cellular energy
Quercetin
Cellular renewal
Glucosamine
Joint support
Betaine
Methylation support
Resveratrol
Longevity support
Vitamin C
Antioxidant
Vitamin B3
DNA repair
Our customers tell it better than we do!
based on 20,000+ happy dog owners
Stop Telling Yourself "He's Just Getting Old"
You've tried the premium food. The extra rest. Maybe a joint chew. Some helped a little. None gave you your dog back, because none of them touched the real problem: the cellular fuel his body stops making with age. Vitality works upstream, at the source.
What dog parents are saying
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June 2026Jun R.Verified buyerFinally moving like himselfMy boy's been slowing down for two years and I just accepted it. Three weeks on Vitality and he's trotting ahead on walks again, even did a lap of the yard. I didn't think a chew could do this.
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June 2026Jasmine T.Verified buyerI actually criedOrdered this fully expecting to return it. A month later my senior girl is playing with her toys again. I cried a little. If your dog has slowed down the way mine had, you'll get it.
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June 2026Danielle M.Verified buyerMy other dog keeps stealing hisNoticed a real difference in the first couple weeks, more energy, easier on the stairs. Now I give it to both my dogs. They think it's a treat, which is half the reason I never forget.
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June 2026Priya K.Verified buyerDidn't expect his eyes to brighten tooBought these for his stiffness. Around week three he just seemed more there, more switched on, following me around the house like he used to. The fog lifted along with the limp.
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June 2026Rachel S.Verified buyerI've tried everything. This one stuck.Joint chews, fish oil, fresh food, you name it, eight months of it. This is the first thing that actually changed how he moves and acts. And he eats it like candy, not like a supplement.
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June 2026Sarah K.Verified buyerHe can do the stairs againHe'd lost his fire this past year and stairs had become a real struggle. Five weeks on Vitality and he's taking them again without the hesitation. A friend noticed before I even mentioned it. Giving it every day now.
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Jun 2026Tanya B.Verified buyerMy vet asked what I changedHe's been off this past year. At his last checkup my vet noticed he seemed brighter and stronger and asked what I'd been doing. I told her, one chew a day. She asked me to send her the link.
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June 2026Alicia W.Verified buyerOrdered it half expecting to return itI'm pretty cynical about supplements. The slow, tired senior I'd resigned myself to is just not how he is now. What surprised me was realizing how much I'd been quietly grieving him until he came back.
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June 2026Keisha M.Verified buyerHis coat looks better tooStarted these for his energy, which improved fast. Then around week three his coat was noticeably shinier and softer. Nobody ever told me those two things were connected.
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June 2026Lauren C.Verified buyerWish I hadn't waited two yearsKept meaning to do something about him getting older and kept putting it off. Finally tried these. The difference in his energy and movement is not subtle. Should've started in 2023.
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June 2026James F.Verified buyerDoes what it saysOne chew in the morning, dog moves better and seems more playful. Tastes good so he never refuses it. Fast shipping too. Simple.
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June 2026Steph O.Verified buyerTook longer than I expectedDidn't notice much the first week so nearly gave up. By week three something had clearly shifted, he's livelier. Keeping it, but be patient.
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June 2026Mark D.Verified buyerShipping was slow but support was quickTook longer to arrive than expected. Emailed them and got a same-day reply with tracking. The chews are good though, my old guy's moving better and he loves the taste.
