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Ingredient · Colorant

Blue Dye No. 1 (Brilliant Blue FCF)

Mixed · 5/10, higher is cleaner

E-number E133

How we reached this

Generally fewer red flags than Red/Yellow dyes; some sensitivity reports in tube-fed patients.

Sources

No source is recorded for this entry yet. We show that plainly rather than implying a citation exists.

Regulatory position

European Unionpermitted
United Statespermitted

Also listed as

Blue 1Brilliant Blue FCFE133

Products containing this · 3

About this rating

Ratings run 1–10, higher is cleaner, and are set editorially against the sources above — see the methodology page for how an ingredient rating becomes part of a product score. Last reviewed 2026-05-22.