Penny is perturbed…I’ve been using Aveeno Baby Sunblock Lotion on my 2 year old but I read that it contains dioxane which causes cancer. Should I switch sunscreens? The Left Brain explains: What is dioxane? Penny, the chemical you’re referring to is actually 1,4-dioxane. It’s not an ingredient so it won’t be listed on the [...] Read more: Is Sunblock Giving My Baby Cancer?