San Francisco-based biotech startup Loyal says a drug it developed to increase dogs' lifespan "has passed a significant milestone on the way to regulatory approval," reports the Washington Post:

The Food and Drug Administration certified the daily pill as having a "reasonable expectation of effectiveness" at extending senior dogs' lifespans. The regulator's Center for Veterinary Medicine still has to certify that the drug is safe and that Loyal can manufacture it at scale before vets can prescribe the pill to dogs 10 years or older that weigh 14 pounds or more. Loyal's CEO, Celine Halioua, estimates that the process should be complete by the end of 2025 and called the FDA's initial recognition "a key step" to extending dogs' lives...

In the past decade, a subculture of tech entrepreneurship has focused on helping people stave off death, hawking custom-made dietary supplements and $2,500 full-body MRIs and investing in the development of antiaging drugs, among many other efforts. According to data firm Pitchbook, about $900 million in venture capital has been poured into antiaging and longevity start-ups in the past 12 months. Loyal has raised more than $150 million in venture funding since its 2019 founding to develop lifespan-extending drugs initially focused on canines.

Launching veterinary drugs is in some ways easier than winning approval for human treatments. Because dogs and humans have evolved alongside one another, Halioua hopes to eventually apply her findings about pets to help prolong their owners' lives. "If we can successfully delay the onset and severity of age-related diseases in dogs, it's extremely compelling evidence that it will also do that in humans," Halioua said. The biological processes of aging unfold faster in dogs because they live such short lives, she said, helping researchers and entrepreneurs probe how they work.
"Loyal's pill is a result of research into how to mimic the life-extending benefit of caloric restriction without the appetite suppression," according to the article, "and without the need for an owner to restrict their dog's food.

"The drug aims to improve a dog's metabolic fitness, or the body's ability to convert nutrients into energy and regulate hormones, which declines in humans and canines with age..."

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