Transparent daily powder
LongTails NAD+ Precursor + Collagen for Dogs
200 mg NR plus 1,500 mg collagen per scoop, fully disclosed. No fillers, binders, or added sugars.
4.4/5 from 73 Amazon reviews From $0.60/day with Subscribe & Save 90-day money-back guarantee
Read the label
The daily stack, without the mystery.
Two actives, fully disclosed: 200 mg NR plus 1,500 mg collagen, with beef bone broth and beef liver. No proprietary blends. No fillers, binders, or sugars.
Cellular Energy
200 mg NR, an NAD+ precursor
Skin & Coat
1,500 mg hydrolyzed collagen
Whole-Food Matrix
Beef bone broth
Everyday Nutrients
Beef liver
The evidence standard
A clear label, with clear limits.
See the active doses first. Open the details when you want the research, source, or evidence boundary.
The full label What is in every scoop?
Each full scoop contains 200 mg nicotinamide riboside chloride and 1,500 mg hydrolyzed bovine collagen, Types I and III. Beef bone broth powder and beef liver powder complete the formula.
Source: LongTails Product Facts panelHuman research What does the NR evidence show?
Human trials found that 100-300 mg per day of NR raises blood NAD+. A full LongTails scoop provides 200 mg, within that studied human range.
Conze et al., Scientific Reports, 2019Our standard Why we only claim what is proven
The human research is on the NAD+ biomarker in people, not a canine outcome trial. So we point you to the dose and the blood-NAD+ data and let them stand on their own, rather than dress them up as a promise we cannot back yet. Holding that line is what premium should mean.
The biomarker finding and the product promise stay separateClean-label standard Why a dry powder?
The formula is made in a US cGMP facility. The dry powder uses no fillers, binders, added sugars, or artificial flavors.
Source: manufacturer and formulation recordsFrom Verified Dog Parents
Selected verified Amazon reviews. Individual experiences vary.
Easy to add to the daily routine
My dog loves it too. It's so easy to implement into his daily food routine.
Daily routineNo convincing needed
I have the 3 pickiest dog eaters ever. They needed no convincing with this.
Picky eatersA routine for both of my dogs
My older dog's skin seems calmer and his coat looks healthier. My younger dog doesn't need much help yet, but I like knowing I'm supporting her health early on.
Skin and coatThe LongTails Daily Routine
One scoop, mixed into the food your dog already eats.
Scoop
One serving per day, precision-dosed by your dog's weight. Scoop included.
Mix
Stir into wet food, raw, or moistened kibble. For a picky dog, begin with a smaller amount and build to the label serving.
Support
Keep it in the daily routine. Proactive support is not a quick fix.
90-Day Money-Back Guarantee
Try the LongTails routine for up to 90 days. If it is not a fit, contact us for a full refund.
No return required.
Frequently Asked Questions
What should I expect?
LongTails is proactive daily support, not a quick fix. Keep it in the routine and give it time. Every dog is different, and individual experiences vary.
Will my dog actually eat it?
Mix the powder into wet food, raw food, or moistened kibble. For a picky dog, begin with a smaller amount and build to the label serving.
Is it safe for my dog?
LongTails is made in the USA in a cGMP facility and has no fillers, binders, or added sugars. Consult your veterinarian before starting any supplement if your dog has a medical condition or takes medication.
Does NAD+ help with cognitive decline or dog dementia?
Honestly, no, and we will not claim it does. The human trials that tested NR for memory and thinking came back null, even at five to ten times the amount in a LongTails scoop, and no published canine study shows an NAD+ precursor improving cognition. What NR does have is strong human evidence for one thing: raising blood NAD+, the coenzyme behind cellular energy and DNA repair. That is the claim we stand on. We would rather tell you where the evidence stops than sell a promise it cannot keep.
Can I pause or cancel my subscription?
Yes. You can skip, change, or cancel future shipments from your account.
How fast will I receive my order?
LongTails orders are fulfilled by Amazon for fast, reliable delivery. Most orders arrive within 2 business days. Subscriptions ship automatically on your schedule with free shipping on every order.
Why We Created LongTails
We started LongTails after asking a simple question: why should dog parents have to choose between modern longevity research and ingredients they can recognize? The answer became a transparent daily powder with two active doses disclosed and no filler ingredients.
- Ozzy & The LongTails Team, by Longer Life, Inc.