What Are Plastics Made Of

Microplastics, defined as plastics smaller than 5 mm, have been detected in human tissues at increasing rates and are associated with potential adverse health effects. Author David Christiani, MD, MPH, from the Department of Environmental Health at Harvard T.H. Chan School of Public Health, discusses this topic and more with JAMA Deputy Editor Kristin Walter, MD, MS. Related Content:

• Microplastics and Human Health

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JAMA Editors' Summary