Research Animals

Animal Research Replacement and Reduction

The 3Rs framework — Replacement, Reduction, and Refinement — guides ethical animal research. Progress on replacement technologies is reducing animal use in many research areas.

Key Facts

The number of animals used in research has declined significantly in some countries as alternatives advance
Organ-on-a-chip technologies can replicate human organ function for drug testing without animal use
Computer modeling and in vitro testing replace certain animal experiments with equivalent or greater predictive value
Regulatory acceptance of validated alternatives is essential for researchers to adopt them in place of animal tests

Welfare Considerations

The 3Rs framework provides an ethical structure for minimizing suffering in animal research while maintaining scientific progress. Replacement with non-animal methods, where validated alternatives exist, is the highest priority. Reduction limits the number of animals used. Refinement minimizes pain and distress during necessary research. Progress on all three Rs requires scientific innovation, regulatory reform, and institutional commitment.

What You Can Do

Support research funding for development and validation of animal research alternatives
Advocate for regulatory acceptance of validated alternative methods in drug and chemical testing
Learn about progress in organ-on-a-chip and other replacement technologies
Choose cosmetics and household products from companies certified as not testing on animals