Made from petroleum, red dye 40 is a synthetic food dye. Some studies suggest a link between red dye 40 and ADHD behavior; the dye might trigger or exacerbate behavioral changes in sensitive children.
The dye's effects vary by individual, but it has been linked to hyperactivity, irritability, and trouble focusing.1 Researchers believe these symptoms may be due to its effects on the gut, brain, and immune system.2
To avoid potential issues, children with ADHD should steer clear of products with red dye 40, including certain candies, soft drinks, and cough medicines.1 Parents should also consider talking to a healthcare provider for tailored advice, and keeping an eye out for possible red dye 40 side effects, such as difficulty sitting still, excessive talking, and irritability.
