Biological Exposure Indices

Biological Exposure Indices (BEIs) are reference values used to assess whether workers are being safely exposed to hazardous substances at their jobs. They are based on biological samples, like blood or urine, and indicate levels that are generally not associated with harmful health effects. BEIs help healthcare providers and employers monitor exposure, ensure safety, and prevent health problems by comparing lab results to these established guidelines. They are part of a broader effort to protect worker health by detecting potential overexposures before symptoms appear.