In toxicology, bioprinting is primarily used to develop in vitro models for studying the effects of substances on human tissues. These 3D models can replicate the complexity of human organs, offering a more accurate representation of how toxins or drugs interact with the body. Bioprinting can thus aid in assessing the toxicity of chemicals without relying on animal testing. Additionally, these models can be used for drug discovery and development, helping to streamline the process and improve safety outcomes.