Is tartrazine (Yellow 5) in kids' snacks an endocrine disruptor?

What's actually in it

Tartrazine, also called Yellow 5 or E102, is one of the most common artificial food dyes in the world. It's in mac and cheese, candy, sports drinks, chips, and dozens of other snacks marketed to kids. It gives food a bright yellow or orange color. It's cheap, stable, and used in huge amounts.

What the research says

A 2026 study in Food Chem Toxicol used the OECD's official testing framework to evaluate whether tartrazine acts as an endocrine disruptor. That means: does it interfere with hormones? The answer was yes. The study mapped out the biological pathways tartrazine disrupts, using what scientists call adverse outcome pathways.

Tartrazine affected hormone signaling at multiple points. It interacted with estrogen receptors, disrupted thyroid hormone pathways, and altered the way cells respond to hormonal signals. These effects happened at concentrations that line up with what people actually consume from food.

Kids are especially at risk. They eat more food dye per pound of body weight than adults, and their hormone systems are still developing. A child eating brightly colored snacks and drinks every day gets a steady dose of a chemical that the latest science says can interfere with hormonal development.