TL;DR: E numbers are EU-approved food additives classified by function, not by danger level. E100–199 are colorants, E200–299 are preservatives, E300–399 are antioxidants, E400–499 are thickeners/emulsifiers. A higher number does not mean more dangerous — it indicates category.
Scanning a food label and seeing “E471, E322, E450…” can feel overwhelming. But the E number system is actually remarkably logical — once you understand the ranges, you can decode any additive immediately.
How Does the E Number System Work?
The “E” stands for Europe — these codes identify food additives that have been evaluated, approved, and deemed safe by the European Union. The number indicates the functional category, not a danger ranking.
The EU didn’t invent this system alone. EFSA (European Food Safety Authority) and JECFA (the FAO/WHO Joint Expert Committee on Food Additives) provide the scientific foundation. For an additive to receive an E number, it must:
- Have scientifically demonstrated safety
- Serve a genuine technological purpose
- Not mislead consumers
- Not pose a health risk at approved usage levels
What Categories Do E Numbers Fall Into?
E100–E199: Colorants — What Do They Add to Color?
Used to maintain, restore, or enhance food color. Heat, light, and storage can destroy natural pigments — colorants compensate.
| Code | Substance | Source | Note |
|---|---|---|---|
| E100 | Curcumin | Turmeric (natural) | Safe; also an antioxidant |
| E101 | Riboflavin (B2) | Natural/synthetic | Safe; a vitamin |
| E102 | Tartrazine | Synthetic | Yellow; children caution (Southampton) |
| E104 | Quinoline yellow | Synthetic | Southampton list |
| E110 | Sunset yellow | Synthetic | Children caution |
| E120 | Carmine | Cochineal insect | Not vegan/vegetarian |
| E122 | Azorubine | Synthetic | Children caution |
| E124 | Ponceau 4R | Synthetic | Children caution |
| E129 | Allura red | Synthetic | Children caution |
| E150a | Caramel | Plain caramelized sugar | Safe |
| E150d | Caramel IV | Ammonium sulfite process | Debated; 4-MEI concerns |
| E160a | Beta-carotene | Carrots/synthetic | Safe; pro-vitamin A |
| E171 | Titanium dioxide | Mineral | Banned in the EU since 2022 |
| E172 | Iron oxides | Mineral | Safe; restricted use |
The Southampton Six: E102, E104, E110, E122, E124, E129 — These six colors, when combined with sodium benzoate in drinks, were linked to increased hyperactivity in children aged 3–9. The EU now requires a warning label on products containing these combinations.
E200–E299: Preservatives — How Do They Prevent Spoilage?
Inhibit bacterial, mold, and yeast growth, extending shelf life and preventing foodborne illness.
| Code | Substance | Note |
|---|---|---|
| E200 | Sorbic acid | Safe; common in cheese, baked goods |
| E202 | Potassium sorbate | Safe; among the most widely used |
| E210 | Benzoic acid | May cause reactions in sensitive individuals |
| E211 | Sodium benzoate | Benzene risk with Vitamin C; children caution |
| E220 | Sulfur dioxide | Caution for asthma patients; mandatory labeling |
| E221–228 | Sulfite family | Asthma trigger risk |
| E249 | Potassium nitrite | Processed meat; nitrosamine risk at high heat |
| E250 | Sodium nitrite | Same |
| E251 | Sodium nitrate | Same |
| E252 | Potassium nitrate | Same |
The nitrate/nitrite group (E249–E252) serves a critical dual function in processed meats — color and botulism prevention — but converts to carcinogenic nitrosamines at high cooking temperatures.
E300–E399: Antioxidants and Acidity Regulators — Why Are They Needed?
Antioxidants prevent fats from turning rancid (oxidation). Acidity regulators maintain target pH.
| Code | Substance | Note |
|---|---|---|
| E300 | Ascorbic acid (Vitamin C) | Safe; antioxidant and preservative |
| E301 | Sodium ascorbate | Safe |
| E306–309 | Tocopherols (Vitamin E) | Safe; natural antioxidants |
| E322 | Lecithin | From soy or eggs; safe, widely used |
| E330 | Citric acid | Safe; naturally abundant in citrus |
| E338 | Phosphoric acid | Cola’s acidity; debated bone density effects at high intake |
| E392 | Rosemary extract | Natural antioxidant; safe |
E400–E499: Thickeners, Gelling Agents, Emulsifiers — Who Creates the Texture?
Stabilize product consistency, prevent separation of oil and water, create gel-like textures.
| Code | Substance | Note |
|---|---|---|
| E401–404 | Alginates | From seaweed; safe |
| E407 | Carrageenan | Red algae; some studies suggest gut inflammation — debated |
| E410 | Locust bean gum | Natural; safe |
| E412 | Guar gum | Natural; safe; prebiotic effect |
| E415 | Xanthan gum | Fermentation-derived; safe |
| E440 | Pectin | From fruit; safe; dietary fiber |
| E471 | Mono- and diglycerides | Very common; safe; may be animal-derived (vegan caution) |
| E476 | PGPR | Cocoa products; safe |
| E481 | Sodium stearoyl lactylate | Bread; safe |
E500–E599: Acidity Regulators and Raising Agents — Why Does Bread Rise?
Adjust pH, prevent caking, create carbon dioxide for leavening.
| Code | Substance | Note |
|---|---|---|
| E500 | Sodium carbonate (soda ash) | Safe; very widely used |
| E501 | Potassium carbonate | Safe |
| E503 | Ammonium carbonate | Safe |
| E551 | Silicon dioxide | Safe; anti-caking in salt, spices |
| E552 | Calcium silicate | Safe |
E600–E699: Flavor Enhancers — Where Does Umami Come From?
Amplify existing flavors without adding taste of their own.
| Code | Substance | Note |
|---|---|---|
| E620 | Glutamic acid | Natural amino acid; safe |
| E621 | MSG (Monosodium glutamate) | Safe; decades of research confirm it |
| E622 | Monopotassium glutamate | Safe |
| E627 | Disodium guanylate | Caution for gout patients (purines) |
| E631 | Disodium inosinate | Same |
| E635 | Ribonucleotides | E627+E631 blend; gout caution |
E900–E999: Miscellaneous — What Else Is There?
Sweeteners, glazing agents, propellant gases, and more.
| Code | Substance | Note |
|---|---|---|
| E901 | Beeswax | Natural; glazing agent |
| E904 | Shellac | Insect-derived; not vegan |
| E950 | Acesulfame K | Artificial sweetener; safe |
| E951 | Aspartame | PKU patients must avoid; IARC Group 2B |
| E952 | Cyclamate | Banned in US; permitted in EU |
| E954 | Saccharin | Old carcinogen claim retracted; safe |
| E955 | Sucralose | Safe; gut microbiome research ongoing |
| E960 | Steviol glycosides | Safe; natural (stevia) |
| E961 | Neotame | Safe; far more potent than aspartame |
E1000–E1999: Modern Processing Aids
Modified starches, enzymes, and stabilizers. Generally considered safe; used for texture management in processed foods.
Which Areas Are Worth Watching?
Not all E numbers are created equal. The ones that warrant more attention:
| Substance | Concern | Status |
|---|---|---|
| Southampton Six (E102, E110, etc.) | Hyperactivity in children | EU mandatory warning label |
| E171 (titanium dioxide) | Genotoxicity | Banned in the EU since 2022 |
| E249–E252 (nitrate/nitrite) | Nitrosamines at high heat | Processed meat = IARC Group 1 |
| E211 + E300 combination | Benzene formation | Manufacturers have reformulated |
| E150d (Caramel IV) | 4-MEI compound | EFSA review ongoing |
| E407 (carrageenan) | Gut inflammation claims | Animal studies; debated in humans |
What Rules Always Apply With E Numbers?
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Natural ≠ safe, synthetic ≠ dangerous. E120 (insect-derived carmine) is natural but controversial; E300 (Vitamin C) is often synthetically produced but entirely safe.
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Higher number doesn’t mean more dangerous. The numbering reflects categories, not risk rankings.
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“No E numbers” doesn’t mean no additives. The ingredient may still be present, just written by its chemical name. “Sodium benzoate” on a label is E211. “Ascorbic acid” is E300.
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Regulations vary by country. Some additives banned in the EU remain legal elsewhere, and vice versa. If you’re buying imported products, the E number on the package may not reflect local regulatory standards.
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The dose makes the poison. An ADI (Acceptable Daily Intake) exists for every approved additive. Below that threshold, the scientific consensus says it’s safe. Context and quantity matter.
When you scan a product with Fudoe, every E number is evaluated against current EFSA and FDA guidelines — so you don’t need to memorize any of this.