Biochemical tests are laboratory procedures used to analyze biological samples, such as blood, urine, or tissue. These tests help identify the presence of specific substances, such as enzymes, hormones, or metabolites, which can indicate health conditions or diseases. Common examples include blood glucose tests for diabetes and liver function tests to assess liver health. These tests often involve chemical reactions that produce measurable changes, such as color changes or the formation of precipitates. Results from biochemical tests can guide diagnosis, treatment decisions, and monitoring of various health issues, making them essential tools in modern medicine.