What is E330? Citric Acid Explained
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E330 is Citric Acid — citric acid — the sharp taste in lemons and limes, now mostly made by fermenting plant sugars using mould.
What is E330 (Citric Acid)?
E330 is Citric Acid, a food additive classified as a acidity regulator that control pH and add tartness. Citric acid — the sharp taste in lemons and limes, now mostly made by fermenting plant sugars using mould. You'll find it in soft drinks, jams, canned goods and many other packaged foods. Citric Acid is one of the better-known food additives and appears regularly in label-reading guides and dietary discussions. Like every E-number, E330 has been authorised for use in food following an EFSA safety evaluation — though authorisation doesn't mean concern-free, as the safety section below explains.
Where is E330 found?
E330 (Citric Acid) is found in soft drinks, jams, canned goods, baked products, cheese, wine.
- soft drinks
- jams
- canned goods
- baked products
- cheese
- wine
Also known as: Citric Acid
Is E330 safe?
EFSA has reviewed E330 and considers it safe for human consumption at the levels used in food. No credible evidence links Citric Acid to harm at normal dietary intakes.
EFSA opinion: Citric Acid — status Safe.
Check the calorie content of foods containing E330. If you’re pregnant, see our pregnancy food safety guide.
Related to E330 (Citric Acid)
Products relevant to this additive and your dietary choices
Additive-Free Cookbook
Recipes using whole, unprocessed ingredients with no E-numbers.
Whole Food Cooking Guide
Guides to cooking from scratch and reducing processed food intake.
E330 FAQs
What is E330 in food?
E330 is Citric Acid — citric acid — the sharp taste in lemons and limes, now mostly made by fermenting plant sugars using mould.
Is E330 safe to eat?
EFSA has reviewed E330 and considers it safe for human consumption at the levels used in food. No credible evidence links Citric Acid to harm at normal dietary intakes.
Is E330 vegan?
E330 (Citric Acid) is vegan. It is derived from fermentation (plant sugars), with no animal involvement in standard food production.
Is E330 halal?
E330 (Citric Acid) is halal. It is derived from fermentation (plant sugars), which involves no haram sources.
The lemon-flavoured additive that's actually made from mould
Citric acid tastes exactly like the sharp, sour note in lemons and limes, and it genuinely does occur naturally in citrus fruit — but that's not where the commercial version in your food comes from. An estimated 99% of the world's commercial citric acid is produced by fermenting a sugar source, typically cornstarch or molasses, with a specific mould called Aspergillus niger. The mould is filtered out once fermentation is complete, and the citric acid is purified and crystallised to food-grade purity. It's the same basic principle as brewing or baking with yeast — a microorganism doing the chemical work — just with a fungus instead. Extracting citric acid directly from citrus fruit at commercial scale would be far more expensive and far less efficient, which is why the fermentation route has been standard industrial practice for most of the last century.
Why it's used for so much more than sour taste
Citric acid's job in food goes well beyond flavour. It's registered as an acidity regulator, but it's also used as an antioxidant (it helps stop fats and oils from turning rancid), a preservative (its acidity discourages microbial growth), and a sequestrant (it binds trace metal ions that would otherwise cause discolouration or off-flavours). That versatility, combined with a genuinely excellent safety record, is why it shows up in such a wide range of products — soft drinks, jams, canned vegetables, sweets, cheese and far more — and why EU regulation permits it at 'quantum satis', meaning there's no specific numeric limit on how much can be used, only as much as achieves the intended technical effect.
The real (minor) considerations worth knowing
Citric acid is metabolised by the body as part of ordinary cellular respiration — it's a normal intermediate in the Krebs cycle, the same energy-producing process every cell runs constantly — so there's no meaningful risk of it building up in the body. The genuine considerations are much smaller in scale: citric acid is still an acid, so frequent exposure to acidic drinks and sour sweets can contribute to dental enamel erosion over time, and people with GERD or a sensitive stomach may notice mild irritation from concentrated sources. Neither of these is really about the additive itself so much as about acidic food and drink generally — the same caution applies to orange juice or vinegar.
Common myths about E330, checked against the evidence
“Citric acid in food is squeezed from lemons”
Not the commercial version. Around 99% of the citric acid used in food manufacturing is produced by fermenting cornstarch or molasses with Aspergillus niger, a mould — not extracted from citrus fruit. The end molecule is chemically identical either way, but the source is fermentation, not fruit.
“Citric acid causes cancer or long-term organ damage”
Not supported by the evidence. Citric acid is a normal part of human metabolism (it's an intermediate in the Krebs cycle, which every cell uses for energy production), and major regulators including the FDA and EFSA classify it as safe with no established Acceptable Daily Intake — a designation reserved for substances with no identified safety concern at normal use levels.
Related Acidity Regulators additives
Also check: safe for cats? · safe for dogs? · calorie checker · medication interactions
Data: Open Food Facts (ODbL) · EFSA