Preclinical research is the stage of scientific investigation that occurs before human clinical trials begin. This research typically involves studies conducted in cells, tissues, or animal models to understand the biological mechanisms of a disease, test potential treatments, and assess their safety and efficacy. Preclinical research is essential for generating data that supports the decision to move a drug or treatment into clinical trials and helps to identify potential risks and side effects early in the drug development process. The findings from preclinical research lay the groundwork for clinical studies in humans and play a critical role in advancing medical knowledge and developing new therapies.