Research Ethics

Animal Testing Alternatives and the 3Rs Framework

The 3Rs framework — Replace Reduce Refine — provides the scientific and ethical foundation for minimizing animal use in research and improving welfare for animals still used.

Key Facts

An estimated 192 million animals are used in scientific research globally each year
The UK 3Rs framework was developed in 1959 by Russell and Burch and is now internationally adopted
Organoids microphysiological systems and computer models increasingly replace animal testing
Many countries now require demonstration that alternatives have been considered before approving animal research

Welfare Considerations

Animals used in research often experience pain, distress, and deprivation as direct consequences of experimental procedures and laboratory housing conditions. The 3Rs framework — Replacement with alternatives, Reduction in numbers, and Refinement of procedures — provides a pathway to systematically reduce this suffering while advancing scientific knowledge. Regulatory requirements for implementing the 3Rs vary significantly across countries.

What You Can Do

Support funding for alternative testing method research and validation
Choose cosmetics certified as cruelty-free and never animal-tested
Advocate for regulatory policies requiring consideration of alternatives before animal use
Donate to organizations developing and validating replacement testing methods