EWG's ingredient guide for children's products highlights 20 common ingredients of concern. Our researchers selected these ingredients from results of more than 3,300 surveys from parents on their children's use of products, combined with information in more than 50 definitive toxicity and regulatory databases. "Ingredients to avoid always" are linked to significant, well-documented health effects, or have been found unsafe for use in children's products. "Ingredients to avoid when possible" are also linked to serious health risks, but their widespread use in products makes them difficult to avoid completely, or the evidence on their hazards is considered preliminary. Use the ingredient guide below to help select safer products for your children.