Genomic screening is crucial in toxicology because it provides detailed insights into the biological effects of toxic substances. It helps in identifying genetic susceptibility to toxins, which can vary significantly among individuals due to genetic differences. This information is vital for understanding the variability in human responses to toxic exposures and can guide the development of personalized medicine approaches. Additionally, genomic screening assists in the identification of potential drug targets and the development of safer pharmaceuticals by predicting adverse drug reactions.