Research Animals

Welfare of Animals in Toxicology Testing

Toxicology testing uses millions of animals annually to determine safety of chemicals, pharmaceuticals, and consumer products, with significant welfare and validity concerns.

Key Facts

LD50 tests establish the dose that kills 50% of test animals — often involving significant suffering
The EU bans cosmetics ingredient animal testing under REACH but many exemptions exist
New approach methodologies including organoids and computer modeling can replace many tests
Regulatory bodies including the EPA are actively working to phase out animal toxicology tests
Rodents are the most common species, but fish, birds, and rabbits are also extensively used

Welfare Considerations

Toxicology animal testing has among the clearest alternatives development of any area of animal research. High-throughput in vitro assays, organ-on-chip technology, computer modelling, and human cell-derived organoids now match or exceed the predictive power of many animal tests for human toxicity. The regulatory framework that requires animal testing has been slow to update despite this evidence, maintaining animal welfare costs that science has already overcome.

What You Can Do

Support organizations developing and validating non-animal toxicology testing methods
Advocate for regulatory modernization to accept validated alternative test methods
Choose products from companies committed to non-animal ingredient testing
Follow EPA and ECHA progress on animal testing phase-out timelines