Comparing E223 - Sodium metabisulphite vs E392 - Extracts of rosemary
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Popular questions
Is sodium metabisulfite bad for you?
For most people it isn’t “bad” at the low levels used in foods, but sulfite‑sensitive individuals (including some asthmatics) can have reactions such as wheezing, hives, or headaches. Regulators set a group ADI for sulfites of 0–0.7 mg SO2 equivalents per kg body weight per day.
Is sodium metabisulfite safe?
Yes—E223 is an approved preservative/antioxidant when used within regulated limits, though sulfites must be declared on labels and can trigger adverse reactions in sensitive people and some asthmatics.
Is sodium metabisulfite gluten free?
Yes. It’s a synthetic inorganic salt and contains no gluten; any gluten risk would come from other ingredients or cross-contact, not the additive itself.
What is sodium metabisulfite used for?
It’s used as an antioxidant and preservative to prevent browning and microbial spoilage in foods and drinks (e.g., wine, cider, dried fruits, seafood, potato products), and as a sanitizing agent for winemaking/brewing equipment.
How much sodium metabisulfite per gallon of wine?
To add about 50 mg/L (ppm) SO2 to 1 US gallon, use roughly 0.28 g sodium metabisulfite (about half a sodium Campden tablet); winemakers typically target 25–50 ppm free SO2 depending on pH and often use potassium metabisulfite instead.
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.