Rosemary extract is a plant-derived antioxidant and natural preservative used in pet food to slow fat oxidation and support shelf stability. Its main active compounds, including carnosic acid and carnosol, provide strong antioxidant activity. It is generally viewed as a cleaner alternative to synthetic preservatives such as BHA and BHT.
| Scientific Name | Rosmarinus officinalis |
| Active Compounds | Carnosic acid, carnosol, rosmarinic acid |
| Function | Natural antioxidant / preservative |
| E Number | E392 |
| Use Rate | Low inclusion |
| Debate Level | Very low |
Rosemary extract is usually a strong premium-quality signal in pet food. It offers meaningful antioxidant value with a more natural label profile than many synthetic preservatives, especially when paired with mixed tocopherols.
Advantages
- Natural source: plant-derived rather than synthetic
- Good safety profile: accepted at normal food-use levels
- Antioxidant activity: helps protect fats from oxidation
- Mild antimicrobial support: may contribute to preservation
- Synergy: often works well alongside tocopherols
Epilepsy Note
Some discussions suggest rosemary may lower seizure threshold in sensitive animals, but whether the tiny preservative-level amounts used in pet food are clinically meaningful remains uncertain. In seizure-prone patients, veterinary caution is still reasonable.
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References
- EFSA. (2008). Use of rosemary extracts as a food additive. EFSA Journal, 721, 1-29.
- NRC. (2006). Nutrient Requirements of Dogs and Cats. National Academies Press.