Synthetic blue dye. Can cause allergic reactions and is banned in some countries.
Patent Blue V is a moderate health concern — best consumed in moderation.
Score impact: −4 points on the FoodsScan score (FoodsScan scores run 0–100, where 100 is best.)
Found in 2 of 9,912 analysed products in the FoodsScan database.
Regulatory sources: EFSA
Patent Blue V is also known as e131, food blue 5, patent blue v — these all refer to the same ingredient.
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