Animal Testing Alternatives: The 3Rs Progress

The 3Rs framework (Replace, Reduce, Refine) has driven significant progress in reducing laboratory animal use and suffering; understanding this progress helps support continued advancement.

Key Facts

EU animal research use decreased by approximately 10% between 2011 and 2019
Organ-on-a-chip technology can replicate human tissue responses with higher predictive validity than animal models
Computer modeling and AI are increasingly used to predict drug toxicity, reducing animal testing needs
Cell culture and organoid systems have replaced many animal tests for skin and eye irritation
The US Environmental Protection Agency committed to eliminating mammalian toxicity testing by 2035

Welfare Considerations

Laboratory animal welfare improvement has followed a dual track: reducing the numbers of animals used through replacement and reduction, while improving the welfare of those that are still used through refinement. Non-animal alternatives are now validated for many toxicity tests previously requiring large numbers of animals. Advanced cell culture systems including organoids provide more human-relevant data for many research questions. Investment in alternative method development and validation is among the most direct ways to reduce laboratory animal suffering at scale.

What You Can Do

Support research institutions with strong 3Rs programs and alternative method development
Choose health, beauty, and household products certified as not tested on animals
Advocate for increased government funding of alternative testing method development
Learn about the 3Rs framework to engage effectively in laboratory animal welfare policy debates