Supports Cellular Health
Helps Boost
Immunity
Promotes Metabolic
Wellness
“I’m impressed by the research behind Longevity15®. C15:0 is the first essential fatty acid discovered in 90 years, and the cellular benefits are well-documented. It helps strengthen cell membranes, supports a healthy inflammatory response, and promotes overall vitality. For aging dogs showing signs of cellular decline, this is one of the most scientifically sound supplements I’ve seen.”
Dr. Daisy May | DVMLongevity15®
Fight Aging At The Cellular Level
1237 Reviews
The first and ONLY daily supplement powered by the groundbreaking C15:0 that helps protect your dog from cellular fragility—the invisible threat stealing years from their life.
87% saw improvement in Gut Health in 3 Months
Complete their diet with robust nutrition thanks to these 15-in 1 chews.
Vet Formulated
- Change or Cancel Subscription Anytime
“Longevity15® is a game-changer for aging dogs. Powered by C15:0, a science-backed fatty acid shown to strengthen cells, this formula supports immune resilience, balanced metabolism, and healthy inflammatory response. Backed by real research, it’s a smart daily tool for helping dogs feel better, move easier, and age more gracefully.”
Dr. Daisy May | DVM
Lifetime Guarantee 
Made in USA 
Vet Formulated
Pet’s Best Life Guarantee
If you or your best friend aren't thrilled for ANY reason, we'll refund every penny. No hoops. No questions. Just results or your money back. Because unlike other supplements on the market, Longevity15 is backed by real science. And we'll prove it.
WARNING:
Your Dog's Cells Are Under Attack Right Now
That slower walk? Not "just aging."
Those longer naps? Not "just
getting old."
That morning
stiffness? Not "just arthritis."
These are WARNINGS your dog's cells are fragmenting.
Right now, your dog's cell membranes are weakening.
Inflammation is spreading. Organs are deteriorating from the
inside out. This is Cellular Fragility Syndrome—and most dog
owners have never heard of it.
By the time you see symptoms, your dog has already lost
MONTHS they could have had with you. Could you have stopped
this? Yes. And it starts with C15:0.
Without the right foundation, inflammation, metabolic imbalances, and reduced mobility can quietly take hold long before serious signs of aging appear.
The First Essential Fatty Acid
Discovered in 90 Years
Longevity15®
is powered by C15:0—the ONLY essential fatty acid discovered in
90 years. Without it, your dog develops Cellular Fragility
Syndrome: cell membranes weaken by up to 80%, inflammation
spreads, organs deteriorate.
This isn't a theory. It's peer-reviewed science backed by 100+
studies and 40+ patents. When C15:0 improved dolphin survival
rates by 80%, researchers knew they'd found something
revolutionary for ALL mammals—including your dog.
This
isn't a band-aid. It's cellular armor.
The Longevity15® Journey
Backed by science.
Loved by dogs.
C15:0 floods into your dog's system and begins strengthening fragile cell membranes. Inflammation, the silent killer, starts calming. The cellular breakdown begins to slow.
New, stronger cells multiply throughout your dog's body. You notice steadier energy. Smoother movement. Fewer stress signals. Your dog is getting what evolution designed them to have.
Digestion improves. Joints move easier. Mood stabilizes. Comfort returns. Because when cells function properly, EVERYTHING functions properly.
This is when dog parents message us with tears in their eyes: "It's like I got my dog back." Because you did. You gave them the one thing standing between them and a longer, healthier life
What Makes Longevity15® Impossible to Replicate?
-
Clinically Researched, Patented Formula
The ONLY dog supplement powered by C15:0 Protected by 40+ patents. Supported by breakthrough research in immunity, metabolism, cellular health, and longevity. Not available in ANY other pet product on the market.
-
Endorsed By Leading Longevity Experts
Top researchers in the longevity space have reviewed the science behind C15:0. The data speaks for itself.
-
Featured In Major Publications
The groundbreaking research on C15:0 has been covered by leading health and wellness publications. This isn't fringe science. It's a mainstream breakthrough.
- Award-Winning Science
The active ingredient that powers Longevity15 has earned recognition from major health organizations. Real results. Real recognition.
- Dogs Actually BEG For It
Natural cheese flavor that dogs go absolutely insane for. No forcing. No fighting. No hiding pills in peanut butter. They LOVE the taste.
- Proudly Made in the USA
Manufactured in certified cGMP facilities with rigorously sourced ingredients. Because cutting corners on your dog's health isn't an option.
Longevity15®
Active Ingredient: FA15 (Pentadecanoic Acid)
Inactive Ingredients: Himalayan cheese, miscanthus
grass, natural flavoring, Mixed tocopherols
(preservative)
Scientifically Proven. Researched Backed. Impossible to Find
Anywhere Else.
99%+
pure, highly bioavailable C15:0
Proven cellular benefits backed by 100+ peer-reviewed
studies
Beneficial for
all ages, and all breeds
No oils,
no fishy taste
Patented & highly
bioavailable
Reviews worth barking about
Customer Reviews
- ★★★★★
Absolutely incredible results
I started my 9-year-old Beagle on Longevity15® after reading about the science behind it… and wow. Within three months, she’s acting years younger. Her energy is back and then some. It’s like she’s aging in reverse.
- ★★★★★
More energy than I’ve seen in years
My 13-year-old Border Collie used to nap most of the day. Four months on Longevity15®, and he’s trotting around like a puppy again. I’m genuinely stunned at the difference. His stiffness is gone, and he just feels alive again.
- ★★★★★
Science-backed and it shows
You can tell Longevity15® isn’t just another “supplement.” The research behind it is solid and it shows in the results. My vet was impressed by how much healthier my Poodle’s coat and joints looked at her last visit. This is next-level dog health.
- ★★★★★
It’s like flipping a switch
I honestly thought my Retriever was slowing down for good. Then we tried Longevity15®. Six months later, she’s running full speed again, playing fetch, and eating better than ever. I’m telling everyone I know… this stuff works.
- ★★★★★
My senior dog feels like a puppy again
After just a few months of Longevity15®, the difference is unreal. My 10-year-old Dachshund used to struggle getting up the stairs. Now she beats me to the top!
- ★★★★★
Longevity15® changed my dog’s life
I’ve tried countless “health boosters” for my senior Shepherd, but nothing compares to Longevity15®. His joints, energy, and mood have all improved drastically. It feels like I’ve added years (not just days) to his life. Worth every cent.