Biomarker validation is the process of confirming that a specific biological marker, or biomarker, accurately indicates a particular disease or condition. This involves rigorous testing to ensure that the biomarker is reliable, reproducible, and relevant in different populations. Validated biomarkers can help in diagnosing diseases, predicting outcomes, and monitoring treatment responses. The validation process typically includes several stages, such as analytical validation, which assesses the biomarker's measurement accuracy, and clinical validation, which evaluates its effectiveness in real-world settings. Successful validation can lead to the biomarker being used in clinical practice, enhancing patient care and treatment strategies.