A biomarker, or biological marker, is in general a substance used as an indicator of a biological state. It is a characteristic that's objectively measured and evaluated as an indicator of normal biological processes, pathogenic processes, or pharmacologic responses to a therapeutic intervention. It is used in many scientific fields. Biomarkers in Medicine Biomarkers are characteristic biological properties that can be detected and measured in parts of the body like the blood or tissue. They… (More on Biomarker)