Comparing E392 - Extracts of rosemary vs E307C - DL-Alpha-tocopherol
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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.
Dl alpha tocopherol which to take?
For supplements, natural RRR-alpha-tocopherol (d-alpha-tocopherol) provides higher bioactivity per mg than synthetic DL-alpha-tocopherol (dl-alpha-tocopherol). As a food additive, E307c is used mainly as an antioxidant rather than a preferred vitamin source.
How is dl alpha tocopherol absorbed?
It’s absorbed in the small intestine with dietary fat via bile salt–formed micelles, incorporated into chylomicrons, and transported through the lymph. The liver preferentially retains 2R stereoisomers (e.g., natural RRR-alpha-tocopherol), so synthetic DL forms are less well retained.
Is dl alpha tocopherol safe?
Yes—at permitted food-use levels it’s considered safe (e.g., GRAS/EU approved) as an antioxidant. Very high supplemental intakes can exceed tolerable upper intake levels and may increase bleeding risk, especially with anticoagulants.
Is dl-alpha tocopherol safe?
Yes; as a food additive (E307c) it is widely authorized and safe at typical levels. Excessive supplement doses can raise bleeding risk and interact with blood thinners, so stay within established upper intake limits.
What contains dl alpha tocopherol?
It’s commonly added to fat- and oil-rich foods to prevent rancidity—such as vegetable oils, spreads/margarine, baked goods, breakfast cereals, snacks, and nut or seed products—and it also appears in dietary supplements.