Comparing E392 - Extracts of rosemary vs E309 - Delta-tocopherol

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Overview

E392 - Extracts of rosemary

Extracts of rosemary (E392) are natural antioxidants made from the leaves of the rosemary plant. They help keep fats and oils from going rancid, which can protect flavor, color, and nutrients in many foods. You’ll most often see them on labels as “rosemary extract” or “E 392.”

E309 - Delta-tocopherol

Delta-tocopherol (E309) is a form of vitamin E used as an antioxidant in foods. It helps keep oils, nuts, and other fatty foods from turning rancid, which protects flavor and color.

Synonyms

E392

Extracts of rosemary

rosemary extract

E309

Delta-tocopherol

δ-tocopherol

Functions

antioxidant

Origins

Plant

Synthetic

Products

Found in 3,436 products

Found in 5 products

Search rank & volume

#2661.4K / mo🇺🇸U.S.

#47050 / mo🇺🇸U.S.

Awareness score

×0.06

under-aware

×1.23

normal

Search volume over time

Interest over time for 3 keywords in U.S. during the last 10 years.

Search history data is not available.

Popular questions

Can dogs have rosemary extract?
Yes—small amounts of rosemary extract (E392) used as a food preservative are generally safe for dogs; avoid giving concentrated essential oils and stop if stomach upset occurs.
Can dogs eat rosemary extract?
It’s commonly used in dog foods as a natural antioxidant and is considered safe at low levels, but consult your vet if your dog is prone to seizures or is pregnant/lactating.
Can cats have rosemary extract?
In the tiny amounts used as a preservative, rosemary extract is generally considered safe for cats; do not use rosemary essential oil, as cats are very sensitive to concentrated oils.
How to extract rosemary oil?
Rosemary essential oil is typically obtained by steam distillation of the herb, producing a highly concentrated oil that is not the same as E392 and isn’t intended for ingestion without expert guidance.
How to make rosemary extract?
Commercial E392 is made by extracting rosemary with food‑grade solvents (e.g., ethanol), then purifying and standardizing carnosic acid/carnosol levels; at home you can approximate it by steeping dried rosemary in high‑proof food‑grade alcohol and filtering, though it won’t be standardized.