Animal testing: alternatives exist and must become a priority

The question is not whether we want safe research. We all do. The question is whether using animals as experimental models is always the best method and how quickly we can replace it with tools more relevant to human biology.

Animal testing: ethical and scientific limitations

Mice, rats, rabbits, primates, and dogs are not miniature humans. We share many biological processes, but differences in species, metabolism, and immune response can limit the transferability of results. This does not mean that every animal study is useless; it means that a model must be critically evaluated, not defended out of habit.

The ethical limit is even clearer: animals cannot consent. They are confined and subjected to procedures in the interest of others. The 3Rs principle — replace, reduce, and refine — already recognizes that the use of animals must decrease. The priority should be the first R: replacement.

What are the alternatives to animal testing?

• Organoids: three-dimensional structures derived from cells that reproduce some functions of human organs.
• Organ-on-chip: microfluidic devices that simulate interactions between tissues, flows, and drugs.
• Human cell cultures: in vitro models more directly relevant to specific mechanisms.
• Computational models and artificial intelligence: tools to predict toxicity and select compounds.
• Microdosing and advanced clinical studies: controlled approaches that collect direct human data.
• Epidemiological data and biobanks: real-world information on populations, diseases, and treatment responses.

Laboratory beagles and the research supply chain

The case of Ridglan Farms and the mobilization against MBR Acres show that testing begins long before the lab. There are specialized breeding facilities that produce animals with that specific destiny.

A beagle is sociable, curious, and capable of trust. Calling it a "model" does not erase these characteristics; it merely makes them less visible.

A scientific transition, not a slogan

Overcoming animal testing requires regulatory work, data sharing, and international collaboration. Regulatory bodies must accept and promote new methods; universities and businesses must train researchers; negative results must be published to avoid duplication.

Science changes when a more relevant method becomes available and when society decides to fund it. Compassion does not weaken rigor; it can indicate where rigor needs to go.

What the public can do

Demand clear data, support non-animal research, choose cruelty-free products, and defend the right to peaceful protest. We can also change the language: not "guinea pigs," but animals used as guinea pigs. The first phrase reduces them to a function; the second reminds us that someone made a choice.