Primate Use in Research: Ethics, Science, and Alternatives

Non-human primates are used in biomedical research for their physiological similarity to humans. Their high cognitive complexity makes their welfare particularly significant and alternatives development urgent.

Key Facts

Approximately 130,000 non-human primates are used in research globally each year
The EU has committed to phasing out primate research but no timeline has been set
Primates used in research include marmosets, macaques, and baboons
Social housing for research primates dramatically improves welfare but creates management challenges
Organoid models and computer simulation are reducing but not yet eliminating the need for primate research in some fields

Welfare Considerations

Primate research raises the most acute welfare questions in the laboratory animal field. Non-human primates are highly cognitively complex, forming lasting social bonds, experiencing complex emotions, and demonstrating extensive self-awareness. Their cognitive proximity to humans makes research use morally weighty in proportion to their welfare significance. Research primates are often housed individually despite strong social needs, causing chronic isolation stress. The scientific justification for primate use — physiological similarity to humans relevant to biomedical research — is also the moral justification for their welfare protection. The development of alternatives including organoids, advanced cell culture systems, and computational models is the highest-priority welfare intervention for this species group.

What You Can Do

Support research funding for non-primate alternatives to primate research
Advocate for the EU and national governments to set specific timelines for primate research phase-out
Donate to organizations developing and validating alternative research methods
Engage with institutional animal ethics committees to ensure primate research is subject to the most rigorous necessity justification