Free Shipping 30-Day Money-Back Guarantee.
Free Shipping 30-Day Money-Back Guarantee.
How Leap Years works
Leap Years is a simple monthly routine that supports your dog where aging starts: inside the cell. One soft chew each morning, and your dog takes it like a treat.
Days 1 and 2Golden chew
Days 3 to 31Brown chew
Every monthRepeat
Science-backed Formula
Veterinarian Developed
CLINICALLY STUDIED IN DOGS
MADE IN USA
Science-backed Formula
Veterinarian Developed
CLINICALLY STUDIED IN DOGS
MADE IN USA
Science-backed Formula
Veterinarian Developed
CLINICALLY STUDIED IN DOGS
MADE IN USA
Science-backed Formula
Veterinarian Developed
CLINICALLY STUDIED IN DOGS
MADE IN USA
Science-backed Formula
Veterinarian Developed
CLINICALLY STUDIED IN DOGS
MADE IN USA
Everything arrives in one jar, sized to your dog. Here is the whole routine.
Days 1 and 2
Start the month with the golden chew. It pairs a senolytic, which supports the body's natural clearing of worn-out "zombie" cells, with an NAD+ precursor.
Senolytic + NAD+
Days 3 to 31
One brown chew every morning for the rest of the month. It keeps supporting NAD+, the molecule every cell uses to make energy.
NAD+ precursor
Every month
When the jar runs out, the next one arrives with a new month of golden and brown chews. Same routine, month after month.
Subscribe and save
Scientists have mapped the key processes behind aging, called the hallmarks of aging. Leap Years is built around two of them.
NAD+ is a molecule every cell uses to turn food into energy and to keep itself in good repair. Research shows NAD+ levels fall as the body ages. Supporting NAD+ helps cells keep doing their job.
Some cells stop working but do not clear out. Researchers call them senescent, or "zombie," cells, and they send out signals that disturb the healthy cells around them. Supporting the body's natural clearing of these cells helps the healthy ones thrive.
Clear out what is not working. Refuel what is. Most supplements pick one lever. Leap Years works on both, which is why it comes as a two-part system.
Take the golden chews from the bag inside the bottle. Give them in the morning on the first two days of the month. Easiest way to remember: same two days, first of the month, every month.
Give the brown chew from the bottle every morning for the rest of the month. Then the cycle starts again.
Give it orally in the morning, on its own or with breakfast. Most dogs take it as a treat, since it is a soft beef-flavored chew rather than a pill.
Small
1/2 Chew
Medium
1 Chew
Large
2 Chews
Extra Large
3 Chews
Your dog's size is set when you order, so the right count arrives in the box.
Not for dogs under 3 years old. For dogs only. If your dog has a medical condition or is on medication, check with your veterinarian before starting.
Proprietary formula with two active
ingredients doing the work, and a short plain
list of everything else.
A combined NAD+ booster & senolytic. The NAD+ side rebuilds the molecule cells use to make energy. The senolytic side supports your dog's natural process for clearing out senescent cells. Given on the first two days of each month.
An NAD+ booster. Given days 3 through 31, it keeps cellular NAD+ levels supported day to day so the work of the monthly reset is not lost between resets.
Bind the soft chew and
hold its texture.
Source of fiber and
bulk
Fat source that keeps the chew
soft rather than hard & dry.
Keep the mix even and the
chew moist.
Antioxidants that also protect
the chew's stability.
Keeps the chew fresh without
a synthetic preservative
package.
Tastes like beef to your dog.
Contains no animal protein.
Clinically studied in dogs
Most dog supplements borrow their science from mice or people. Leap Years was put through a clinical trial in 70 senior dogs, on the same two-chew schedule you give at home.
Main result at 3 months
Improved cognitive function
in senior dogs, as assessed by their owners. The full dose delivered the largest improvement.
p = 0.02 statistically significant
The study measured its main result at 90 days. Here is what the first three months look like.
Month 1Golden chews on days 1 and 2, then one brown chew every morning. It takes seconds, and most dogs take it like a treat. Jot down a few notes on how your dog is today.
Month 2A new golden chew reset starts the month. Keep the routine going every morning. Consistency is what makes the system work.
Month 3This is when the NC State trial measured its main result. Look back at your month 1 notes and see what has changed.
These are the everyday signs the study tracked.
Try Risk-Free
Give Leap Years to your dog. If it is not right for them, or if you simply change your mind, tell us within 30 days and we will refund you. One email. No forms to complete, no reason required, no return shipping to arrange.
We built this product on evidence rather than promises, & this guarantee works
the same way. The risk of finding out sits with us, not with you.
Two chews, one month, every month. Clinically studied in dogs. Start your dog's first 90 days today.
