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Rosemary Extract (E 392)

Last reviewed October 19, 2026

In plain words: Rosemary extract (E 392) is used to keep fats from going rancid. It is different from rosemary essential oil and the kitchen herb.

What the evidence review says

Rosemary extract is used to keep fats from going rancid. JECFA set an acceptable daily intake based on thyroid-hormone effects seen in young rats, and judged the margin for children sufficient. It is different from rosemary essential oil and the kitchen herb.

Low concern at authorized uses, with a real toxicology endpoint behind the ADI. JECFA's earlier temporary ADI reflected incomplete developmental data. In 2025 JECFA replaced it with an ADI of 0–0.6 mg/kg body weight per day, expressed as carnosic acid plus carnosol, after a rat study of thyroid hormone in pups. The benchmark dose for reduced T4 was higher than the previous NOAEL, and JECFA judged the margin for children sufficient even where high-percentile child exposure slightly exceeded the ADI.

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This page is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 19, 2026.