Laboratory Animal Welfare and the 3Rs

The 3Rs framework — Replace, Reduce, Refine — guides the ethical use of animals in research. Progress on all three dimensions is essential to improving the welfare of millions of research animals.

Key Facts

Around 3 million procedures are performed on animals in UK laboratories annually
Mice account for around 60% of all research animal procedures
The 3Rs were first articulated by Russell and Burch in 1959
The Animals (Scientific Procedures) Act 1986 governs animal research in the UK
Severity classification (mild/moderate/severe/non-recovery) is required for all procedures

Welfare Considerations

Laboratory animals experience pain, distress, and suffering in the service of medical and scientific research. The moral justification for this is the benefit to human and animal health that research produces, but this justification is contingent on the harm being minimised. The 3Rs provide a framework for this minimisation: Replace (use non-animal methods wherever possible), Reduce (use the fewest animals necessary to obtain valid results), and Refine (use methods that minimise suffering). Progress on all three requires investment in alternative methods, better experimental design, and genuine commitment from researchers and funders to welfare as a priority.

What You Can Do

Support the NC3Rs which funds replacement and refinement research
Advocate for increased funding for alternative methods to animal testing
Choose cosmetics and household products from cruelty-free certified brands
Support EU efforts to mandate validation of alternative test methods
Engage thoughtfully with the welfare-research trade-off rather than rejecting research outright