New research has raised concerns about the potential health risks of Allura Red AC, a food dye widely used to make products like candies, soft drinks, cereals, and dairy items more appealing to children. A study conducted at McMaster University has found that this dye may harm gut health by disrupting the gut barrier, which can trigger inflammatory bowel diseases (IBDs) like Crohn’s and ulcerative colitis.

Tests on animals showed that Allura Red AC influences serotonin production in the gut, which affects gut microbiota composition, ultimately making the body more vulnerable to colitis. Professor Waliul Khan, a lead researcher from McMaster, called the findings “alarming” in the journal Nature Communications, highlighting their importance for public health and encouraging a closer look at food additives impacting gut health.