Will LOY-001 establish efficacy?

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2028

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Loyal, a company developing treatments for longevity in dogs, recently announced that they have "completed the technical effectiveness portion of their conditional approval for [their first drug candidate]".

Will they successfully establish efficacy (according to the FDA)? Resolves NO if they fail for any reason, including, for example, running out of money before they complete their studies.

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Longevity

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Status as of October 2026 from Loyal's own material: LOY-001's effectiveness (RXE) section was accepted in November 2023, and Loyal's current veterinary brief describes LOY-001 and LOY-003 as in early-stage development. The regulatory momentum since has been on LOY-002, with its safety section accepted in January 2026 and the manufacturing section outstanding; LOY-003 completed its RXE section in 2026 (the acceptance mentioned above). Sources and dates: https://w0lph.github.io/k9/trials/loyal-loy-001-large-dogs.html

@traders fresh update: Celine Halioua (@celinehalioua) on X

Celine Halioua (@celinehalioua) on X

When we started Loyal there was no FDA pathway for a any lifespan extension drug. Today the FDA accepted our third one! LOY-003, our daily pill for helping large dogs live longer (and healthier) lives, has earned RXE efficacy approval.

reposted

Loyal is in my broader professional orbit (eg Celine was at the Future Forum), so I was surprised to see a LessWrong post arguing that their drug doesn't work...