6 Active Ingredients. Every Dose Published.
Every active ingredient is at the exact dose from peer-reviewed canine research. An antioxidant complex from a 2.8-year aging study, plus a pet-specific probiotic tested in dogs at this exact dose. No proprietary blends. Nothing hidden.
Vitamin E
d-alpha Tocopheryl Succinate, 210 mgSupports cognitive function. Exact dose from a 2.8-year University of Kentucky study that showed cognitive improvement in aging Beagles within 2 weeks.
L-Carnitine + Alpha-Lipoic Acid
Mitochondrial Cofactors, 52 mg + 26 mgSupports healthy energy levels and cellular health. Mitochondrial cofactors from the same university study. ALA recycles other antioxidants in the body.
Bacillus subtilis DE-CA9
Pet-Specific Probiotic, 1 Billion CFUSpore-forming probiotic specifically developed for dogs. Studied in a placebo-controlled trial in Beagles at this exact dose. Supports digestive health and fresh breath.
Chicory Inulin
Prebiotic Fiber, 200 mgSelectively feeds beneficial gut bacteria. Works synergistically with the probiotic to support healthy gut flora and digestive balance.
Vitamin C
Ascorbic Acid, 16 mgSupports antioxidant defense. Works synergistically with Vitamin E. Study-matched dose from the University of Kentucky cognitive aging trial.
Beef Liver + Bone Broth Base
Species-Appropriate Flavor BaseReal food your dog was built to eat. The umami flavor profile means most dogs treat it like a reward, not a chore. Daily compliance solved.
No fillers. No binders. No artificial flavors. No synthetic colorants. No soy, wheat, corn, or dairy.
The LIFE+ Daily Routine
Research-informed vitality support in one scoop a day. No pills, no chews, no hassle.
Scoop
One serving per day, precision-dosed by your dog's weight. 60 scoops per jar.
Mix
Stir into wet food, raw, or kibble. Dogs love the beef liver and bone broth flavor.
Support
Antioxidant and probiotic benefits compound over time. Consistency is key.
Two Studies. One Scoop.
LIFE+ combines an antioxidant complex from a 2.8-year University of Kentucky aging study in Beagles with a pet-specific probiotic tested in a separate placebo-controlled canine trial. The antioxidant complex supports cognitive function and cellular health. The probiotic supports digestive health and was shown to reduce markers of oxidative stress. Together, they work through two different pathways to support your dog's vitality.
Backed by Canine Research
Our ingredients are supported by peer-reviewed studies conducted in dogs and published in leading journals.
Cognitive Aging & Antioxidants
-
Antioxidants in the Canine Model of Human Aging
Biochimica et Biophysica Acta (BBA), 2012
Key finding: A 2.8-year study in 48 aging Beagles showed cognitive improvement within 2 weeks with an antioxidant + mitochondrial cofactor diet. Treated dogs maintained cognition while untreated dogs declined. Reduced oxidative damage and improved mitochondrial function.
Pet-Specific Probiotic
-
Effect of the Probiotic Bacillus subtilis DE-CA9 on Fecal Scores, Serum Oxidative Stress Markers and Metabolome in Healthy Dogs
Veterinary Sciences, 2023
Key finding: A placebo-controlled trial in Beagles showed DE-CA9 at 1 billion CFU/day was safe and well-tolerated, reduced markers of oxidative stress (AOPP, TBARS, d-ROMs), and significantly increased serum tryptophan levels.
Probiotic & Aging
-
Compound Probiotics Improved Canine Feed Intake, Weight Gain, Immunity and Intestinal Microbiota
Frontiers in Immunology, 2019
Key finding: 90-dog trial showed probiotic supplementation improved feed intake and immunity in elderly dogs, with gut microbiota shifting toward a younger-like composition within 60 days. Strongest benefits in the elderly group.
Study 1 provides the exact doses for our antioxidant complex. Study 2 tested our exact probiotic strain at our exact dose. Study 3 supports the probiotic mechanism in aging dogs.
What to Expect with LIFE+
Results build over time. Here's what to look for based on the research and early parent reports.
Week 1-2
Settling In
Dogs take to the beef liver and broth flavor immediately. The powder blends into any food. Probiotic begins colonizing the gut.
Week 2-4
Early Signs
The university study showed cognitive improvement within 2 weeks. Watch for more alertness, eagerness for walks, and fresher breath.
Month 2-3
Building Momentum
Antioxidant support is designed to compound over time. In the university study, treated dogs maintained cognitive performance while untreated dogs declined.
Month 3+
The Long Game
The university study maintained cognitive benefits over 2.8 years. Cellular support is a long-term investment in your dog's vitality.
Every dog is different. The antioxidant complex showed measurable cognitive improvement within 2 weeks in the university study.
Why Powder?
Precision, purity, and probiotic potency. Chew formats require heat processing that degrades live probiotics.
| Feature | Powder (LongTails) | Chews | Pills |
|---|---|---|---|
| Dosing |
Adjust by weight
|
Fixed dose
|
Fixed dose
|
| Probiotic Potency |
Preserved (no heat)
|
Degraded by heat
|
Capsule barrier
|
| Purity |
Zero fillers needed
|
Binders required
|
Capsule shell
|
| Taste |
Mixes into any food
|
Some dogs refuse
|
Often spit out
|
| Absorption |
Fast dissolve
|
Through binder matrix
|
Capsule first
|
Clean label. No compromises.
Why LIFE+?
Fewer ingredients. Higher doses. Actual science.
| Daily Serving (1 Scoop) | LongTails LIFE+ | 20-Ingredient Blends | Proprietary Formulas |
|---|---|---|---|
| Price/day |
$0.67
|
$0.83
|
$1.33
|
| Active Ingredients |
6
|
~20
|
Proprietary
|
| Doses Published |
|
|
|
| Canine Studies |
2
|
0
|
0
|
| Pet-Specific Probiotic |
|
|
|
| No fillers or binders |
|
|
|
Recommended Dosage Guide
| Dog Weight | Daily Serving | Ideal Subscription | Deliver Every |
|---|---|---|---|
Small Breed
<22 lbs
|
1/2 Scoop | 120 days | 4 months |
Medium Breed
22–55 lbs
|
1 Scoop | 60 days | 2 months |
Large Breed
55–100 lbs
|
1.5 Scoops | 40 days | 6 weeks |
|
Extra Large Breed
>100 lbs
|
2 Scoops | 30 days | month |
Each jar contains 60 scoops. Doses are based on the University of Kentucky study protocol, scaled by body weight.
Frequently Asked Questions
How long until I see results?
The university study showed measurable cognitive improvement within 2 weeks. Most parents report noticing more alertness and energy around weeks 2-4. Fresher breath from the probiotic often appears in the first few weeks. Full antioxidant benefits compound over months of consistent use.
Will my dog actually eat it?
Yes. The beef liver and bone broth base gives LIFE+ a savory umami flavor dogs naturally love. It's the same species-appropriate flavor profile proven in our NAD+ Precursor Collagen. Most dogs eat it without hesitation.
Is it safe for my dog?
LIFE+ is made in an FDA-registered, cGMP facility in the USA. The probiotic (DE-CA9) was tested in a placebo-controlled safety trial in dogs and showed no adverse effects. The antioxidant complex was used safely in dogs for 2.8 years in the university study. No fillers, binders, or artificial additives. Consult your vet if your dog has a specific medical condition.
What age should my dog start?
LIFE+ is designed for dogs 5 and older. Senior dogs (7+) often show the most noticeable improvements in energy and alertness. The university study was conducted in aging dogs (8-12 years old), but proactive cellular support benefits dogs before visible decline begins.
Can I give my dog both LongTails products?
Yes. NAD+ Precursor Collagen and LIFE+ target different pathways — cellular energy and joint health (NAD+, collagen) vs. antioxidant defense and digestive health (study-matched antioxidants, probiotic). The active ingredients don't overlap. Both share a beef liver and bone broth base for flavor, and the combined intake is well within safe limits. Follow the dosing guide for each product based on your dog's weight.
If your dog is on blood-thinning medication or is a breed predisposed to copper storage disease (Bedlington Terrier, Labrador, Doberman, West Highland White), consult your vet first. If you feed additional liver treats on top of both products, factor that into your dog's total vitamin A intake.
How is LIFE+ different from your NAD+ Precursor Collagen?
They're complementary, not competing. NAD+ Precursor Collagen supports cellular energy (NAD+) and joint health (collagen). LIFE+ supports cognitive function (antioxidants), digestive health (probiotic + prebiotic), and cellular defense against oxidative stress. Different ingredients, different pathways, same mission: more good days.
What studies is this formula based on?
Two primary canine studies: (1) Dowling & Head, 2012 — a 2.8-year longitudinal study in 48 aging Beagles at the University of Kentucky that tested the exact antioxidant doses in our formula. (2) Allenspach et al., 2023 — a placebo-controlled trial that tested our exact probiotic strain (DE-CA9) at our exact dose (1 billion CFU/day) in Beagles. Both are published in peer-reviewed journals.
When will my preorder ship?
LIFE+ is available now as a preorder from our first production run, estimated to ship in Fall 2026. You are charged today to reserve your jar. You can cancel any time before it ships for a full refund, and if we are unable to ship by the estimated window we will refund you in full. We will email you with tracking the moment your order is on its way.
90-Day Money-Back Guarantee
Try LIFE+ for 90 days. If your dog isn't thriving on it, we'll refund you in full. No questions asked.
Your only risk is not trying.
Why We Created LIFE+
We built LIFE+ because we couldn't find a senior dog supplement that published its doses or cited actual canine research. Most brands hide behind proprietary blends and fairy-dust ingredient lists. We went the other way: 6 active ingredients, every dose matched to a published study, nothing hidden. Because your dog deserves a supplement built on evidence, not marketing.
- Ozzy & The LongTails Team, by Longer Life, Inc.
LIFE+ Daily Vitality
$39.95