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Hyperactivity. Attention effects. Allergic reactions. Migraines. The Southampton Study documented all of these — which is why the EU requires a warning label on Red 40. Here is the evidence, and a free scanner to find Red 40 in any product.
Educational only — not medical advice. Always talk to your pediatrician or allergist about dye sensitivity in your child. But the research base is large: behavioral effects, allergic reactions, migraines, and GI symptoms have all been documented in peer-reviewed studies. The EU acted on this in 2010. The FDA is now finally following with a 2026 voluntary phase-out.
If you suspect Red 40 sensitivity in your family, the first step is finding it in your pantry. Scan any product free.
Scan one product right now. Free. No signup. See research-backed flags and dye-free swaps.
Our scores are never influenced by brands. Data sourced from EFSA, FDA, Health Canada, and peer-reviewed research. Educational use only — consult your doctor for medical decisions.