This document lists 55 toxic ingredients found in cosmetic products. It provides a brief description for each ingredient, noting potential health effects like irritation, allergic reactions, and indications that some ingredients contain or produce known carcinogens like formaldehyde and 1,4-dioxane. Common toxic ingredients included anionic surfactants, formaldehyde-releasing preservatives, fragrance, and silicone derivatives. The document warns that long-term exposure to some ingredients through repeated skin application has been linked to increased risks of cancer and organ damage.