In human biomonitoring (HBM), exposure to chemical substances in the human body through the analysis of, for example, blood or urine samples. HBM is a central information and control tool for health-related environmental protection. The data can serve as an early warning system for previously unrecognized exposures. Risk assessment is required to determine whether the detection of a substance is associated with a health risk. HBM also provides scientifically sound data on whether bans or restrictions on certain substances actually lead to a reduction in exposure in the population.