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Animal testing, also known as animal experimentation, involves using non-human animals in experiments that seek to control the variables affecting the behavior or biological system under study. This practice is most prevalent in fields such as medicine, cosmetics, and other consumer goods. Supporters argue that animal testing has contributed significantly to scientific advancements, including the development of life-saving drugs and medical procedures. They contend that, currently, there are no fully effective alternatives to predict how new drugs and cosmetics will react in complex living organisms. Additionally, they assert that ethical regulations in many countries ensure that animals are used in the most humane way possible.

Critics of animal testing, however, highlight the moral issues associated with causing pain, suffering, or death to animals. They argue that animals have rights similar to humans and should not be subjected to experimentation. They also point out that the results from animal testing may not always accurately predict outcomes in humans due to biological differences between species. Moreover, critics advocate for the use of alternative testing methods that do not involve animals, such as computer modeling and tissue cultures, which have shown promise in some areas of research.

The debate over the morality of animal testing is complex, encompassing ethical, scientific, and regulatory considerations. Whether animal testing is justified depends on weighing its potential benefits for human welfare against the moral and ethical implications of using animals for experimentation