Kealy et al. 2002: Purina Dog Lifespan Study
A lifetime Labrador study showing body condition moved lifespan; useful for dog longevity claims, not supplement proof.
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A curated archive of the studies behind modern dog and cat wellness: landmark trials, ingredient evidence, biological mechanisms, and the limits of what each paper can honestly prove.
Each study brief translates the paper's design, species, endpoints, evidence grade, and commercial relevance so shoppers can separate real nutrition science from marketing theater.
A means strong species-specific nutrition evidence. B means a useful controlled pet trial with defined endpoints. C means a mechanistic, analytical, absorption, or case-control paper that can explain an ingredient or claim, but should not be treated as product proof on its own.
Flagship trials sit beside ingredient-mechanism papers. Use the domain and evidence grade on each card to understand how much weight the paper should carry.
A lifetime Labrador study showing body condition moved lifespan; useful for dog longevity claims, not supplement proof.
Read study briefA senior-cat complete-diet trial showing why whole-routine nutrition matters more than single-ingredient lifespan claims.
Read study briefAged-beagle cognition work showing nutrition and enrichment belong together in senior-dog brain support.
Read study briefA senior-dog NAD+ and senolytic trial with an owner-assessed cognition signal and important mixed endpoints.
Read study briefA canine skin-barrier paper showing ceramide architecture matters, without proving oral supplement or dermatitis treatment claims.
Read study briefA 90-day EPA/DHA coat-quality trial that turns omega claims into dose, duration, and freshness questions.
Read study briefAn oral hyaluronan absorption study supporting HA plausibility, not skin, coat, or joint outcome proof.
Read study briefA dog-specific reishi nutrition study with immune-marker signals and clear limits around disease-protection claims.
Read study briefA collagen peptide dog study in osteoarthritis patients that supports structural seriousness, not beauty outcome borrowing.
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