What Effects Do Numbered Dyes Have On Us?

While food dyes are approved for use in the U.S., a growing body of research raises questions about their safety — especially for children.

Potential Side Effects and Health Concerns:

  • Behavioral Effects in Children: A well-known study published in The Lancet (2007) found that artificial food colorings (including Yellow 5 and Red 40) may increase hyperactivity in children, even those without ADHD. This study prompted the European Union to place warning labels on foods containing these dyes.
  • Allergic Reactions and Intolerances: According to the FDA, some dyes (especially Yellow 5) may cause allergic reactions in sensitive individuals, including asthma, hives, and nasal congestion.
  • Eczema and Skin Sensitivities: Anecdotal and parent-reported evidence consistently links dyes to skin issues like eczema, especially in toddlers and young children.
  • Gut and Immune System Impact: Preliminary animal studies suggest synthetic dyes may alter gut bacteria and increase inflammation, though more human research is needed (Environmental Health Perspectives, 2012).
  • Cancer Risk: Red 3 (Erythrosine) was banned in cosmetics due to cancer risks in animal studies, but it’s still allowed in foods like cherries and candies in the U.S.

The FDA still considers these dyes “generally recognized as safe,” but research continues to evolve — and many families choose to avoid them just to be safe.

Disclaimer: The health effects discussed in this post are based on current research, but findings may vary and evolve. This information is not intended to replace medical guidance. Please consult a healthcare professional for personalized advice.

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