The appeal of blueberries is their reputation as an antioxidant-rich fruit. For cats, the story is more measured: antioxidant activity is a broad concept, and the amount a cat gets from a few berries is limited. Still, phenolic compounds are part of what makes blueberries interesting, and their presence has been noted even in commercial kibble that includes blueberries as an ingredient (PAL, 2025).
Think of this as “supportive context,” not a headline promise. If you’re already doing the fundamentals—hydration, appropriate calories, dental care, and regular veterinary check-ins—then small, safe additions can fit. If you’re looking for a single change that transforms health, blueberries are unlikely to be that change.