The Welfare of Animals in Laboratory Safety Testing

Safety testing for chemicals, pesticides, and industrial compounds uses millions of animals annually.

Key Facts

Approximately 22 million animals are used annually in the US for safety testing
LD50 tests — measuring lethal dose in 50% of test animals — cause significant suffering
EU REACH regulations require extensive chemical safety testing with high animal use
New approach methods including in vitro and computational models are increasingly validated

Welfare Considerations

Chemical safety testing represents a large and often overlooked category of animal use. LD50 and other toxicity tests cause clear suffering — animals are dosed with substances until they die or show severe toxic effects. The scientific limitations of these tests are well-documented — many animal toxicology results do not predict human outcomes reliably. Regulatory reform accepting validated non-animal alternatives and the development of in vitro and computational methods are both progressing, but the pace of change is slower than welfare advocates and scientists argue is warranted.

What You Can Do

Support regulatory reform accepting validated non-animal safety testing methods
Advocate for investment in alternatives to animal toxicology testing
Engage with chemical companies about their safety testing policies
Support organizations developing and validating non-animal safety testing alternatives