The discussion surrounding the health effects of Red Dye 40 has some merit but needs more explanation and context. Research shows that Red Dye 40, which is an artificial food coloring, can cause allergic reactions like hives, sneezing, and irritation in certain individuals. "Red 40, a common food dye, can cause an allergic reaction in some individuals. Symptoms may include hives, itchy skin, nasal congestion, and rarely, anaphylaxis"(Wyndly, 2024).
https://www.wyndly.com/blogs/learn/red-40-allergy#:~:text=Yes%2C%20Red%2040%2C%20a%20common,Red%2040%20without%20any%20issues.
Adding to this, some studies have hinted at a possible connection between artificial dyes, including Red Dye 40, and behavior changes in children, especially those already diagnosed with ADHD. However, these findings are not consistently supported, and the FDA says Red Dye 40 safe for consumption with limits. While there are reports and small studies suggesting that eliminating Red Dye 40 from diets might help alleviate symptoms for some, there is no conclusive evidence establishing a direct cause-and-effect relationship. "Despite widespread concerns, there is a lack of scientific evidence supporting the notion that red dye causes autism"(Mark Elias, 2024).The claim brings up valid concerns that need more investigation, but the current scientific consensus does not entirely back it.
https://www.discoveryaba.com/aba-therapy/does-red-cause-autism