Reviews push pet food science beyond functional ingredient claims

A pair of recent review papers is helping sharpen the language, and the evidence base, around “functional ingredients” in commercial pet food. In Veterinary Research Communications, Xinzi Guo, Nisha Farooq, and Hehe Liu argue that companion animal nutrition needs clearer definitions for functional ingredients, bioactive compounds, and dietary supplements, borrowing a framework long used in human nutrition. A second review in Animals focuses specifically on plant-derived ingredients for dogs and cats, grouping them by phytochemical class and describing reported effects on oxidative stress, inflammation, immunity, lipid metabolism, skin health, and the gut microbiome. Together, the papers reflect a broader shift in pet nutrition from marketing around ingredient presence to a more mechanistic discussion of what specific compounds may do, and under what conditions. (mdpi.com)

Why it matters: For veterinary professionals, the reviews are a reminder that interest in “functional” pet foods is moving faster than the clinical evidence in many categories. Regulators still anchor nutritional adequacy around complete-and-balanced standards, not around added botanicals, fibers, probiotics, or other bioactives, and AAFCO notes that healthy dogs and cats eating an appropriate complete-and-balanced diet generally do not need supplements unless a veterinarian recommends them. That leaves clinicians to sort promising mechanisms from limited in vivo evidence, especially when pet parents ask about polyphenols, cannabinoids, algae-derived ingredients, prebiotics, or antioxidant claims on-pack. (fda.gov)

What to watch: Expect more scrutiny of whether functional claims in pet food can be tied to meaningful dose, bioavailability, safety, and species-specific outcomes, particularly in cats. (mdpi.com)