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Renowned Harvard University geneticist and longevity researcher David Sinclair recently made an astonishing assertion: Scientists had developed the first pill — well, a soft, beef-flavored chew — “proven to reverse aging” in dogs. Which miracle molecules delivered this supposed scientific breakthrough, he didn’t say. But he told his 438,000 followers on X where they could buy it: the website of Animal Bioscience, a veterinary supplement company he founded and which is headed by his brother, Nick Sinclair.

The claim in a company news release, followed by the tweet stating that the supplement was “proven to slow the effects of aging,” has sparked outrage from other scientists online, and the board of an international organization of top longevity researchers — which David Sinclair leads — will discuss the matter at its meeting this week.

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Despite his enthusiasm, there is no published scientific research that has yet demonstrated the compounds in Animal Bioscience’s supplements — which have been on the market for more than a year — reverse or even slow aging in dogs.

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