Animal Bioscience "Leap Years" claim -> scientist revolt -> Sinclair steps down as Academy president
In Feb/Mar 2024, Animal Bioscience (co-founded by Sinclair; his brother Nick is CEO) quoted Sinclair calling a dog supplement "the first supplement proven to reverse aging in dogs." The field revolted: Matt Kaeberlein called it "a lie," another scientist called Sinclair a "snake oil salesman," and incoming Academy president Nir Barzilai objected to the data, framing, and selling. Sinclair resigned as Academy president in March 2024.
In February and March of 2024, Animal Bioscience — a pet-supplement company co-founded by David Sinclair, with his brother Nick Sinclair as CEO — issued a release quoting David Sinclair describing its "Leap Years" product as "the first supplement proven to reverse aging in dogs." The claim triggered an open, on-record revolt among longevity scientists. Matt Kaeberlein (University of Washington) called the claim "a lie." Another scientist in the field described Sinclair as a "snake oil salesman." Nir Barzilai, who was about to become president of the Academy for Health and Lifespan Research, said publicly that "the data is not good, you're calling it the wrong thing, and then you're selling it — the selling is a step too far." Multiple Academy members resigned in protest, the board pressed Sinclair to step down, and he resigned as president of the Academy for Health and Lifespan Research in March 2024; the company subsequently revised its release. The Wall Street Journal later published a piece titled "A 'Reverse Aging' Guru's Trail of Failed Businesses."
Why it matters (spine): this is the load-bearing context for every other card in this garden that touches Sinclair. It is a documented, on-the-record case of the longevity field's own leading scientists publicly repudiating a commercial claim made by one of their most prominent members — which is exactly the kind of independent, peer-policed signal that should carry more weight than the original marketing claim itself.
Live status / Provenance: STAT News, "A Harvard scientist's claim about reversing aging in dogs sparked outrage. Then he stepped down" (Jenny Gold / Matthew Herper byline convention; STAT News, 5 Mar 2024) — reporting that directly quotes Matt Kaeberlein and Nir Barzilai on the record. Animal Bioscience is co-founded by David A. Sinclair (Harvard Medical School), CEO Nick Sinclair (credited). This is a settled historical event, not an open scientific question — there is no falsifier because it did happen and is documented across STAT, WSJ, and the Academy's own leadership record.
So we should treat this as the standing instruction for how to weight every Sinclair-branded commercial claim going forward: verify it independently, exactly as the field's own scientists did here, and never let the credibility of his peer-reviewed lab work transfer automatically to a product he or an affiliated company is selling.
This is the most important context in the sweep. Weight Sinclair-BRANDED commercial claims as marketing to verify independently; weight his peer-reviewed lab work on its own merits. The two are not the same object.
domains: longevity · hype · credibility · conflict-of-interest