Can the yellow food dye tartrazine affect brain function?

What's actually in it

Tartrazine, also labeled as Yellow 5 or E102, is one of the most commonly used artificial food dyes. It shows up in snack foods, candy, cereals, soft drinks, mac and cheese, pickles, and even some medications and vitamins. It gives food that bright yellow or green-yellow color.

Tartrazine has been flagged for decades as a potential concern for hyperactivity in children, but the evidence was considered inconsistent. Newer research is looking beyond just behavioral effects to examine direct impacts on brain tissue.

What the research says

A 2025 study in J Hazard Mater used a zebrafish model to test the effects of chronic dietary tartrazine exposure at doses that scale to typical human intake levels. Zebrafish are commonly used in toxicology because their biology overlaps with humans in key ways.

The tartrazine-exposed animals showed behavioral changes including reduced activity patterns and altered social behavior. The researchers also found structural changes in brain tissue and disrupted neural signaling pathways.

The study characterized this as a translational model for human health risk, meaning the doses and exposure patterns were designed to mimic what a person eating tartrazine-containing food daily would experience. The effects appeared after chronic, not acute, exposure.

Read ingredient labels and avoid products listing tartrazine, Yellow 5, or E102. Many brands now offer versions of popular foods without artificial dyes. Natural alternatives like turmeric and annatto can provide yellow color without synthetic chemicals.