Endocrine disrupting chemicals (EDCs) are environmental chemicals that affect the function of the endocrine system—chemicals found in certain drugs, pesticides, and compounds used in the plastics industry. Commonweal has been concerned about, and working to bring awareness about, the adverse environmental and health effects of endocrine disrupting chemicals for decades. Founded in 2016 by Jerrold J. (Jerry) Heindel, Phd, Commonweal’s Healthy Environment and Endocrine Disruptor Strategies (HEEDS) is a non-profit multidisciplinary coalition of scientists dedicated to improving communication, coordination and collaboration in the endocrine disruption field. HEEDS is developed by scientists for scientists. It operates via an advisory board. There are no memberships or fees. HEEDS is open to ideas that can help move endocrine disruption science forward, increase collaborations across scientific disciplines, and communicate results to the general public and in the policy arena.