Why E-Numbers Matter for Lactose Intolerance
Food additives (E-numbers) can be derived from milk without it being obvious from the name. If you're lactose intolerant, knowing which E-numbers may contain lactose helps you make safer choices.
E-Numbers That May Contain Lactose
Definitely from milk:
| E-Number | Name | Notes |
|---|---|---|
| E270 | Lactic acid | Can be from milk OR fermentation - check source |
| E325 | Sodium lactate | May be milk-derived |
| E326 | Potassium lactate | May be milk-derived |
| E327 | Calcium lactate | May be milk-derived |
| E472b | Lactic acid esters of mono- and diglycerides | Usually plant-based, but can be milk-derived |
| E585 | Ferrous lactate | May be milk-derived |
| E966 | Lactitol | Derived from lactose - avoid |
Important note on "lactic" vs "lactose":
The word "lactic" does not always mean milk. Lactic acid (E270) is commonly produced by bacterial fermentation of sugar and is usually dairy-free. However, it can be derived from milk. When in doubt, contact the manufacturer.
Usually safe but check:
| E-Number | Name | Notes |
|---|---|---|
| E270 | Lactic acid | Usually from fermentation, not milk |
| E330 | Citric acid | No relation to dairy |
| E322 | Lecithin | Usually from soy or sunflower |
| E471 | Mono- and diglycerides | Usually plant-based |
E-Numbers That Are Always Dairy-Free
Most E-numbers are mineral, plant, or synthetic-based and contain no lactose. This includes all:
- Colors (E100-E199) - generally dairy-free
- Preservatives (E200-E299) - generally dairy-free
- Antioxidants (E300-E399) - generally dairy-free
- Thickeners (E400-E499) - generally dairy-free
The Real Hidden Lactose Culprits
More often than E-numbers, hidden lactose comes from:
- Whey powder - very common in processed foods
- Milk powder / skim milk powder - added for flavor
- Casein / caseinate - milk protein, may contain lactose
- "Natural flavor" - can occasionally be dairy-derived
How to Check
- Read the bold allergens - "milk" will be highlighted
- Check for "lactose" in the ingredients
- Look at E-numbers - if it says E966 (lactitol), avoid it
- When unsure about E270/E325-E327, contact manufacturer
- Scan with FoodScan.ai - get instant ingredient analysis with additive breakdown
