Children's Health Defense (CHD) is a nonprofit organization based in the U.S. that aims to end childhood health epidemics by addressing toxic environmental exposures. Its mission is to restore and protect children's health, hold responsible parties accountable, and establish safeguards against future harm. CHD operates through four main pillars: litigation, education, science, and advocacy.

The organization actively pursues legal action with numerous lawsuits to protect children's health rights. It provides educational resources, including articles, books, and films, to inform the public about health topics often overlooked by mainstream media. CHD conducts scientific research to identify the causes of chronic illnesses in children and mobilizes advocacy efforts to drive policy change and empower grassroots movements. Founded in 2007, CHD has grown into a global movement that unites parents, scientists, medical professionals, and advocates concerned about childhood health issues.