Science-backed information for pet supplement and food decisions. No fluff, no hidden agendas—just the evidence.
We do the hard work of reading the research so you can make confident decisions for your pet.
Our team reviews the scientific literature so you don't have to wade through dense papers or unreliable blogs.
Browse SupplementsEvery supplement gets a letter grade (A–F) based on the quality and quantity of scientific evidence.
Our MethodologyClear, jargon-free summaries help you choose the best care for your pet with confidence.
Senior Dog CornerExplore our evidence-based reviews across pet care categories.
Every supplement receives a letter grade based on the quality and quantity of scientific evidence. Expand the details below to see our methodology.
Probable Benefit
At least one well-designed RCT or several strong observational studies. More data is needed for "certainty."
| Grade | Meaning |
|---|---|
| A | Highly likely/Proven Benefit |
| B | Probable Benefit |
| C | Emerging / Inconclusive |
| D | Weak |
| F | No evidence of benefit, possible harm |
| n/a | Insufficient data |