E101A · Colours
Riboflavin-5'-phosphate
A safe, functional vitamin used for its bright yellow color.
- Category
- Colours
- Vegan
- Yes
- Vegetarian
- Yes
What it is
A highly soluble derivative of Vitamin B2 (Riboflavin) used both as a yellow food color and a dietary supplement.
How it is used in food
Provides a bright yellow-orange colour and serves as a highly soluble form of Vitamin B2.
Commonly found in- Energy drinks
- Dairy products
- Dietary supplements
Health and safety
No known risks at dietary intake; excess is naturally excreted.
Re-evaluated by EFSA and confirmed safe for use as a food colourant and nutrient.
Regulatory status
| Region | Status | Notes |
|---|---|---|
| Australia & New Zealand FSANZ |
Permitted | Permitted under the FSANZ Food Standards Code. |
| European Union EFSA / European Commission |
Not approved | Not on the EU authorised list of food additives (Annex II). |
| United States FDA (Food and Drug Administration) |
Permitted | Authorised for food use by the FDA (often GRAS for standard additives). |
Identification on labels
- E-number
- E101a
Worth knowing
It is the phosphorylated form of riboflavin, making it much easier to dissolve in water for beverages.
Conclusion
A safe, functional vitamin used for its bright yellow color.
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Open the appEntry last reviewed 2026-07-28.
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