- In Vitro Methods: These laboratory-based assays use cells or biological molecules outside their normal biological context. In vitro tests are often used for initial screening and include techniques like cell culture tests, enzyme assays, and molecular biology methods.
- In Vivo Testing: This method involves studying the effects of substances on whole living organisms, such as rodents. In vivo tests provide comprehensive data on the systemic effects of substances, but they are more time-consuming and expensive compared to in vitro methods.
