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Answer: Blue Dye 1 is restricted (not fully banned) in European Union (permitted as E133 but with less use than in US). The FDA still allows it in US food. Commonly found in: Blue Gatorade, Blue Powerade, M&Ms (blue).
TL;DR: Blue Dye 1 is restricted in the EU but allowed in the US (food additives).
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Also called Brilliant Blue FCF. (E133)
Other names: Brilliant Blue FCF, E133, FD&C Blue No. 1, CI 42090
| EU status | Restricted |
|---|---|
| US status | Allowed |
| Risk level | — |
| Where it shows up | Blue Gatorade, Blue Powerade, M&Ms (blue), Froot Loops, Lucky Charms, Blue Kool-Aid |
Blue Dye 1 (Brilliant Blue FCF) is a synthetic blue triarylmethane dye derived from petroleum. It produces a brilliant sky-blue color and is highly water-soluble. Unlike the azo dyes (Red 40, Yellow 5/6), Blue 1 belongs to the triarylmethane chemical class.
Blue Dye 1 produces a vivid blue color virtually impossible to achieve with natural colorants at comparable cost and stability. It is stable under heat, light, and acidic conditions. Mixed with Yellow 5 it produces green tones. It is used in beverages, candies, icings, cereals, and dairy products.
Blue Dye 1 was historically banned in several European countries before EU harmonization permitted it (as E133). EFSA's 2010 comprehensive safety re-evaluation found no evidence of carcinogenicity in standard animal tests. The ADI was set at 6 mg/kg body weight. The most significant documented safety concern for Blue 1 involves intravenous/enteral administration rather than dietary intake. In 2003, the FDA issued a Public Health Advisory warning against using Blue 1 (used as a food coloring agent in enteral nutrition formulas to detect aspiration in critically ill patients) after multiple case reports — including deaths — documented that Blue 1 can be absorbed through damaged intestinal mucosa and cause cardiovascular instability, metabolic acidosis, and death. The FDA advisory specifically warned against this clinical use in intensive care patients. This is a medical use concern, not a dietary intake concern. For healthy consumers eating normally, EFSA found no significant safety concerns at food use levels. Blue 1 was not included in the 2007 Lancet hyperactivity study. However, it falls under the FDA's April 2025 announcement to phase out all petroleum-based synthetic food dyes, reflecting updated policy on the class as a whole rather than specific Blue 1 data. Historically, Blue 1 was banned in multiple European countries due to safety concerns, though EU harmonization later permitted it with E-number labeling requirements. This history suggests precautionary concern even when formal regulatory action was not sustained.
For educational use only. This page summarizes the regulatory status of Blue Dye 1with citations to the primary sources below. It is not medical advice. Regulatory status is not the same as a proven health effect — read the cited sources for their exact wording, and consult a doctor for decisions about your or your family's health.
Blue is the hardest color to achieve naturally in food. Spirulina extract (phycocyanin) provides natural blue-green color — used by Whole Foods and some EU candy brands. Butterfly pea flower extract creates vivid blue that shifts purple with pH — FDA approved for specific beverages in 2021. These natural blues are less stable under heat and acid but improving with encapsulation technology.
For healthy individuals at typical dietary amounts, EFSA found no significant harm (ADI 6 mg/kg). However, the FDA issued a 2003 Public Health Advisory warning against clinical use in critically ill patients. Multiple European countries banned it historically. The FDA's 2025 phase-out covers Blue 1.
Blue Gatorade/Powerade, M&Ms (blue), Froot Loops, Lucky Charms, blue Kool-Aid, blue Jell-O, various blue candies, frosting, Slurpees, and some blue-tinted ice creams.
Historically banned in Belgium, France, Germany, Switzerland, Sweden, and Austria before EU harmonization. EU now permits it (E133) with mandatory labeling. FDA announced phase-out in 2025.
Brilliant Blue FCF is the international name for FD&C Blue No. 1 (E133). It is a synthetic triarylmethane dye from petroleum producing vivid bright blue.
Spirulina phycocyanin (approved in some countries) and butterfly pea flower extract (FDA-approved 2021 for certain beverages) are the main natural blue alternatives. Indigo carmine (Blue 2) is another synthetic option more common in Europe.
Blue 1 was not in the 2007 Lancet study mixture. Individual studies on Blue 1 and hyperactivity are limited. The FDA's 2025 phase-out reflects concern about the synthetic dye class broadly.
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No — Blue Dye 1 is fully synthetic from petroleum. It should not be confused with spirulina (phycocyanin), butterfly pea flower, or indigo, which are naturally derived blue colorants.
Blue pigments are rare in edible plants. Most plant blues are anthocyanins, which shift from red-purple in acid to blue in alkaline conditions, making stable food-blue difficult. Available sources (butterfly pea, spirulina, gardenia) produce less intense, less stable blues than synthetic Blue 1.
Audited products that don't contain Blue Dye 1.
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