In pursuit of
We’re developing the first drugs explicitly intended to extend healthspan and lifespan—first in dogs, and then in humans, too.
By quantifying and controlling the mechanisms of pathological aging, we hope to delay the onset & reduce the severity of age-related diseases. More, healthier years.
Backed by the best
Our mission is supported by world-class funds and investors.
khosla ventures
First Round
Collaborative Fund
The Longevity Fund
Our first products to market are focused on longevity and healthspan in dogs. Discover Loyal.
Tibetan Mastiff
Helping dogs live longer, healthier lives
Dogs are our closest companions – in every sense of the word. We co-evolved with dogs and have shared our environment for tens of thousands of years. Understanding and treating pathological dog aging may help us learn more about human aging, too.
In the news
BBC Radio
The Immortals — Ep 5: The Trial
This Week in Startups
Developing drugs to extend dog lifespans with Loyal CEO Celine Halioua
Startup is developing a pill intended to help large dogs live longer
Fox Interviewer
40 Under 40, #21: Celine Halioua
A Dog's Life Could Hold the Key to Anti-Aging Drugs for Humans
Danny in the Valley
Loyal’s Celine Halioua: “The first life extension drug for dogs”
San Francisco Business Times
40 Under 40: Celine Halioua, Loyal
Explain it to me like I’m a 10 year old
Ep.52: Being Loyal to Our Dogs, with Celine Halioua
This 30 Under 30 Alumna Is One Step Closer To Helping Your Dogs Live Longer
First longevity clinical study design fetches FDA approval
ABC 7 News
More time with your pets? SF biotech company trying to create fountain of youth for dogs
KFI AM 640
Is There A Fountain of Youth For Dogs?
Popular Mechanics
Scientists Are Testing a Pill to Make Dogs Stop Aging
San Francisco Chronicle
A fountain of youth for dogs? This S.F. startup says it’s on the way
The Problem With Jon Stewart Podcast
The CEO in Search Of The Fountain Of Youth…For Dogs
Biotech startup predicts age of dogs in hunt for clues about human aging
The Search for a Pill That Can Help Dogs—and Humans—Live Longer
Two “Magic Pills” To Extend Your Dog’s Life Are On The Way
MIT Technology Review
These scientists are working to extend the lifespan of pet dogs – and their owners
The New Statesman
Do you want to live forever? Big Tech and the quest for eternal youth
Freethink (Heretics)
“I work on dog lifespan extension.” | Celine Halioua for Heretics
Huge If True
Why your dog isn’t the age you think
Inside the 30 Under 30 List
Founder-led biotech is making space for ideas– and diverse leaders– where it didn’t exist before
Loyal raises $27M, aims to give dog owners more time with their pets
San Francisco Business Times
Why this San Francisco anti-aging drug startup thinks it’s barking up the right tree
Veterinary Practice News
Canine cancer biomarkers to be explored
The Times
A dog’s life can be longer, promises tech start-up
The Hill
How Silicon Valley is helping dogs live longer– so humans can live longer too
Silicon Valley Wants Dogs to Live Longer So Humans Can, Too
Aging is one of the most impactful problems you can work on.

Work with some of the most dynamic and accomplished scientists, engineers, operators, and creatives in the industry, on problems that matter:

  • Developing better ways to quantify the aging process
  • Predictive modeling of aging trajectories
  • Building robust longitudinal aging datasets
  • Characterizing healthy versus pathological aging
  • Commercializing aging drugs
Built by the best
Our team hails from the world’s leading companies and institutions.
UC Davis
University of Oxford
Our team
Papers published
Clinical drug programs worked on
Years of research
Open roles
Cellular Longevity Inc. is working to develop therapies that treat the underlying causes of aging in dogs. Information on this website pertains to pre-clinical or clinical candidates in development and has not been reviewed or approved by the Food and Drug Administration.
© 2023 Cellular Longevity, Inc.