Who Still Does Animal Testing? The Hidden Realities Behind Modern Science

Animal testing has been a longstanding practice in scientific and medical research, helping to develop life-saving drugs, vaccines, and safety assessments for consumer goods. But as awareness grows about ethical concerns and the availability of new technologies, many people are asking: Who still does animal testing today? The answer is complex—animal testing persists across a wide range of industries and countries, despite growing opposition and alternatives.

This article dives deep into the current landscape of animal experimentation. We will explore who conducts these tests, where they happen, why they continue, and how modern science is slowly shifting toward humane and advanced non-animal methods.

The Global Scope of Animal Testing Today

Contrary to what many hope, animal testing remains widespread across the globe. Estimates suggest that over 100 million animals are used annually in laboratory experiments worldwide—though the exact figure is uncertain due to inconsistent reporting. These animals include mice, rats, rabbits, guinea pigs, dogs, cats, primates, and even fish.

While some countries are tightening regulations, others continue to rely heavily on animal models for scientific advancement and regulatory compliance.

Key Regions Where Animal Testing is Still Prevalent

• United States: One of the largest users of lab animals, primarily driven by pharmaceutical and biomedical research.
• China: Required animal testing for cosmetics and many imported health products until recent changes.
• Japan: Maintains reliance on animal testing for chemical safety assessments and drug development.
• European Union: Has banned animal testing for cosmetics but still permits it in medical and scientific research.
• India: Has made progress in banning cosmetic testing but supports animal models in regulatory toxicology.

Despite international efforts toward reduction—such as the 3Rs principle (Replace, Reduce, Refine)—millions of animals are still used annually in countries with advanced scientific infrastructure.

Who Are the Primary Conductors of Animal Testing?

The responsibility for animal testing lies not with a single entity but with a diverse network of organizations across sectors. Here’s a breakdown of the major players:

1. Research Institutions and Universities

Universities and public research laboratories remain among the most significant users of animals for scientific experimentation. Institutions such as Harvard Medical School, Johns Hopkins University, and the University of California system conduct animal research in neuroscience, genetics, immunology, and cancer biology.

While many of these institutions publicly support the 3Rs, their dependence on grant funding—especially from agencies like the National Institutes of Health (NIH)—means that animal models are still considered essential for advancing medical knowledge.

What Kinds of Studies Occur in Academic Labs?

Animal testing in universities often includes:

• Inducing diseases like cancer, Alzheimer’s, or diabetes in animals to study progression.
• Behavioral experiments involving stress, fear, or learning.
• Surgical training and development of medical devices.

While some argue that such research leads to breakthroughs like organ transplants and treatments for paralysis, critics point out that results from animal models often fail to translate to human outcomes.

2. Pharmaceutical and Biotech Companies

Some of the most high-profile animal testing occurs in the pharmaceutical industry. Companies such as Pfizer, Merck, Johnson & Johnson, and Roche use animal testing during the drug development process—particularly in preclinical trials.

Regulatory agencies like the FDA (U.S. Food and Drug Administration) and the EMA (European Medicines Agency) typically require animal testing before human clinical trials begin. This includes safety assessments such as:

• Toxicity testing (how much of a drug causes harm).
• Pharmacokinetics (how the body absorbs, distributes, and eliminates a drug).
• Reproductive and developmental toxicity (testing effects on fetuses during pregnancy).

Despite advances in computational models and human tissue cultures, animal testing remains a regulatory hurdle that few companies can bypass.

The Cost of Innovation: Balancing Ethics and Progress

Many pharmaceutical companies insist animal testing remains necessary to ensure human safety. However, others are beginning to explore alternatives. For example, Emulate Inc. has developed “organ-on-a-chip” technology that mimics human organ function, reducing the need for animal models in certain studies.

Still, the transition is slow. Regulatory systems designed around animal data create inertia, and developing new validation methods takes time and resources.

3. Government Agencies and Regulatory Bodies

Animal testing often stems not from scientific curiosity, but from legal requirements. Government agencies mandate animal experiments to ensure the safety of drugs, chemicals, pesticides, and food additives.

Key examples include:

While the U.S. Environmental Protection Agency (EPA) has pledged to reduce mammal testing by 30% by 2025 and eliminate it entirely by 2035, it still relies on animals for assessing chemical toxicity. Similarly, regulatory frameworks in developing countries often default to outdated animal models due to lack of infrastructure for alternative methods.

4. Cosmetic and Consumer Product Companies

Cosmetic testing on animals has become one of the most controversial aspects of animal experimentation. While the EU banned cosmetic animal testing in 2013 and countries like India, Israel, and Canada have followed suit, the situation in other regions remains problematic.

China, in particular, was long known for its compulsory animal testing on imported cosmetics. However, in 2021, China began allowing certain domestic cosmetics to skip animal testing, and in 2023, it removed mandatory post-market animal tests for ordinary cosmetics produced domestically.

Despite progress, animal testing in the cosmetics industry continues in several ways:

• Companies sell products in markets where animal testing is required, prompting global testing.
• Some ingredients are tested on animals years ago, and companies still reference that data.
• “Safety reassessment” of ingredients sometimes leads to new animal experiments.

Brands like L’Oréal and Unilever have invested heavily in alternatives and are largely cruelty-free in Western markets. However, their global supply chains and distribution networks mean they may still be indirectly involved in animal testing where regulations demand it.

Animals Commonly Used in Testing and Their Roles

Understanding who conducts animal testing also requires knowing which animals are used and for what purposes.

Mice and Rats: The Dominant Species

Over 95% of laboratory animals are rodents—mostly mice and rats. These animals are favored for their:

• Short life cycles.
• Genetic similarity to humans (especially in disease research).
• Ease of breeding and housing.

Genetically modified mice are frequently used to model human diseases like cancer and genetic disorders. However, critics note that mice respond differently from humans physiologically, which can lead to misleading results.

Rabbits: Testing Irritation and Toxicity

Rabbits are commonly used in dermal and eye irritation tests, such as the infamous Draize test—where substances are applied to the eyes or skin of restrained animals to assess harmful effects.

While efforts are underway to replace this test with reconstructed human tissue models (like EpiDerm™ or SkinEthic™), it is still used in some countries for chemical safety assessments.

Dogs and Cats: Cardiovascular and Chronic Studies

Beagles are frequently used in research due to their docile nature and manageable size. They are often employed in:

• Long-term toxicity studies for pharmaceuticals.
• Cardiovascular research.
• Testing medical devices like pacemakers.

Cats are also used, particularly in neuroscience, due to the similarity of their nervous systems to humans. However, their use is less common and highly controversial.

Non-Human Primates: The Ethical Frontier

Non-human primates—such as macaques, marmosets, and baboons—are used in highly sensitive research due to their cognitive and biological similarity to humans. They are primarily used in:

• Neuroscience and brain disorder studies (e.g., Parkinson’s).
• Infectious disease research, especially for vaccines (e.g., HIV, Ebola).
• Developmental and reproductive toxicity testing.

The use of primates is ethically charged. Organizations like PETA and the Humane Society have frequently exposed cruelty associated with primate experiments. In the U.S., primate testing accounts for less than 1% of all animal research but draws the most public scrutiny.

The Drivers Behind Continued Animal Testing

Why does animal testing persist despite ethical concerns and scientific advances? Several factors sustain this practice.

Regulatory Compliance and Legal Requirements

The most significant reason is that regulatory frameworks still demand animal data. Agencies like the FDA and EMA rely on decades of animal-based precedent. Changing these protocols requires extensive validation of new methods, which can take years.

For example, a new toxicity test using human stem cells might be scientifically sound, but if it hasn’t been officially validated by regulators, companies cannot submit it in place of animal data.

Institutional and Cultural Inertia

Science is often resistant to change. Many researchers are trained in animal-based methodologies and may lack exposure to alternative technologies. Moreover, peer-reviewed journals and funding bodies may favor traditional approaches, disincentivizing innovation.

Concerns About Human Safety

Proponents of animal testing argue it protects humans. They contend that skipping animal studies could risk exposing patients to unsafe drugs, citing historical cases like thalidomide (a drug tested on animals, though inadequately, which still caused birth defects).

However, opponents counter that animal models themselves can be unreliable predictors. For instance, over 90% of drugs that pass animal tests fail in human clinical trials due to lack of efficacy or unforeseen side effects.

Emerging Alternatives and the Shift Toward Change

While animal testing continues, the scientific landscape is evolving. Driven by ethics, innovation, and regulatory shifts, new alternatives are emerging—and succeeding.

1. Organ-on-a-Chip and Microphysiological Systems

These are microfluidic cell culture devices that simulate the activities of human organs. Developed by institutions like Harvard’s Wyss Institute, they can model lung, liver, heart, and gut functions with human cells.

Such systems allow researchers to study drug interactions in human-relevant tissues without using animals. They offer more accurate predictions of human response and are increasingly accepted by regulators.

2. In Vitro Models Using Human Cells

Techniques involving human-derived cells—such as 3D skin models, stem cells, and organoids (mini-organs grown in a dish)—are being used to replace animal toxicity and efficacy tests.

For example, the EpiSkin and MatTek models are now approved in the EU for skin irritation testing.

3. Advanced Computer Simulations and AI

Computational toxicology and AI-powered models can predict chemical toxicity based on existing databases. These “in silico” methods are faster and cheaper than animal tests.

The EPA’s CompTox Chemicals Dashboard is an example of a large-scale database that enables researchers to assess risks without animal testing.

4. Human-Based Clinical and Epidemiological Research

Studies involving human volunteers, microdosing (administering tiny, safe amounts of drugs), and real-world evidence from electronic health records are providing valuable alternatives.

These approaches bypass species differences entirely and generate data directly relevant to human health.

The Role of Activism and Public Opinion

Public pressure plays a crucial role in shaping the future of animal testing. Campaigns led by Cruelty Free International, PETA, HSI, and numerous grassroots organizations have:

• Influenced legislative changes (e.g., EU cosmetic bans).
• Helped certify cruelty-free brands.
• Exposed unethical practices in research labs.

Social media has amplified these efforts, allowing consumers to make informed purchasing decisions. Platforms like the Leaping Bunny Program and the Choose Cruelty-Free logo help shoppers identify products not tested on animals.

As companies recognize that consumers prefer humane practices, more are investing in alternatives. Even giants like L’Oréal now operate state-of-the-art laboratories focused on synthetic skin models.

The Future: Toward a World Without Animal Testing

The momentum toward ending animal testing is building—but it requires coordinated effort across science, industry, and regulation.

Legislation Is Making a Difference

Several countries are taking bold steps:

• The Netherlands has committed to ending all animal testing by 2025.
• New Zealand and Canada have strengthened animal welfare laws and limited primate testing.
• The U.S. EPA aims to eliminate mammal testing by 2035.
• The E.U. Parliament has debated a full roadmap to phase out animal testing across sectors.

However, legislation must be supported by viable alternatives and updated testing standards.

Industry Leadership and Collaboration Are Key

Forward-thinking companies are forming coalitions to advocate for change. Initiatives like the European Partnership for Alternative Approaches to Animal Testing (EPAA) and the International Council for Laboratory Animal Science (ICLAS) bring together industry, governments, and scientists to accelerate the adoption of non-animal methods.

Meanwhile, startups focused on lab-grown tissues and AI modeling are gaining investment and credibility. Over time, these innovations could render traditional animal models obsolete.

What You Can Do to Help

Consumers, patients, and citizens have power. Supporting cruelty-free brands, advocating for policy reforms, and staying informed about alternatives can collectively drive change.

Additionally, promoting science education that emphasizes the limitations of animal models and the promise of human-based research can encourage the next generation of researchers to think differently.

Conclusion: Transparency, Ethics, and Innovation Must Lead the Way

So, who still does animal testing? The answer includes pharmaceutical companies, universities, government agencies, and consumer product manufacturers—especially in countries with outdated regulatory requirements or limited access to alternatives. While progress is being made, the practice remains embedded in the fabric of modern science.

The path forward isn’t about vilifying scientists or halting medical progress. It’s about modernizing research with more human-relevant, ethical, and accurate methods. As technology advances and public awareness grows, the days of widespread animal testing may finally be numbered.

The shift won’t happen overnight, but with continued pressure, investment in innovation, and alignment among governments, industries, and citizens, a future without animal testing is not just possible—it is inevitable.

Which industries still rely on animal testing today?

Several industries continue to use animal testing despite growing ethical concerns and advances in alternative methods. The pharmaceutical industry remains one of the largest users, often required by regulatory agencies to test new drugs on animals before human clinical trials. These tests aim to evaluate safety, toxicity, and dosage levels. Similarly, the cosmetics industry, although significantly reduced in animal testing due to global bans in the EU, India, and several other countries, still sees activity in regions like China, where regulations historically required animal testing for imported cosmetics. While China has made recent progress allowing some products to bypass such tests, certain categories still necessitate animal trials.

Other sectors include biomedical research, particularly in universities and government labs investigating diseases like cancer, diabetes, and neurological disorders. Chemical manufacturing and agricultural industries also conduct animal testing to assess the safety of pesticides, industrial chemicals, and food additives under regulations like REACH in Europe and the Toxic Substances Control Act (TSCA) in the U.S. Even in sectors moving toward alternatives, animal testing persists where legal requirements lag behind scientific innovation or where validated non-animal methods are not yet accepted. This patchwork regulatory environment means animal testing endures in pockets of industry where compliance outweighs ethical or scientific concerns.

Why hasn’t animal testing been completely replaced by modern alternatives?

Despite significant advancements in technologies like in vitro cell cultures, organ-on-a-chip systems, and computer modeling, animal testing has not been fully replaced due to regulatory inertia and scientific uncertainty. Many national regulatory agencies, including the U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA), still mandate animal studies to ensure drug safety before human trials. These institutions rely on decades of historical data derived from animal models, making it difficult to approve new medicines without similar testing paradigms. Additionally, complex biological systems involving multiple organs, immune responses, and long-term effects are difficult to replicate entirely with current non-animal methods.

Moreover, validating new alternative methods is a lengthy and expensive process. Regulatory bodies require rigorous proof that alternatives are as reliable or more reliable than animal models before adopting them. This slows their integration, particularly for assessing chronic toxicity or reproductive effects. Industry players may also be hesitant to invest fully in new technologies without clear regulatory pathways. While promising, alternatives often cannot yet mimic the full physiological complexity of living organisms, especially for systemic effects across interconnected systems. As a result, science continues to use animals as a “gold standard” in many areas—though this is gradually changing as new data supports the efficacy of alternatives.

Are there countries that still require animal testing by law?

Yes, several countries still legally require animal testing for certain products, particularly in the realm of cosmetics and chemicals. China, for example, historically required all imported cosmetics to undergo animal testing, though recent reforms have exempted some general cosmetics if manufacturers provide sufficient safety data. However, innovative or higher-risk products may still be subject to mandatory animal testing. Similarly, in the United States, while no law explicitly mandates animal testing for cosmetics, the Food and Drug Administration (FDA) recommends it for product safety, giving companies little incentive to avoid it entirely. In chemical regulation, the U.S. Environmental Protection Agency (EPA) and other bodies may require animal data under TSCA unless alternatives are proven adequate.

Outside of cosmetics, countries such as Japan, Canada, and Australia still incorporate animal testing requirements in pharmaceutical development and chemical safety assessments. Regulations in these regions often follow international guidelines like those from the Organisation for Economic Co-operation and Development (OECD), which accept animal studies for regulatory submissions. Even countries with strong animal welfare laws, including the UK and Germany, permit animal testing under strict oversight if deemed scientifically necessary. The lack of globally harmonized bans and the complexity of risk assessment mean that legal requirements continue to support or indirectly encourage animal testing in many jurisdictions.

What types of animals are most commonly used in testing today?

Rodents, particularly mice and rats, are by far the most commonly used animals in scientific testing, making up over 90% of laboratory animals in many countries. Their genetic similarity to humans, short reproductive cycles, and well-understood biology make them ideal for research in genetics, toxicology, and drug development. Zebrafish are also widely used in developmental and genetic studies due to their transparent embryos and rapid growth. Rabbits are frequently employed in eye and skin irritation tests, while guinea pigs are used in allergy and respiratory research because of their sensitive immune responses.

Larger animals such as dogs, pigs, and non-human primates are used less frequently but remain vital in certain types of research. Beagles, for example, are commonly used in toxicology and cardiovascular studies because of their docile nature and size. Non-human primates, due to their close neurological and physiological resemblance to humans, are used in neuroscience, infectious disease, and vaccine research, though their use is highly regulated and increasingly controversial. Each species is chosen based on the scientific question being addressed, regulatory standards, and availability of alternatives—but growing ethical scrutiny and technical advances are pressuring researchers to reduce reliance on higher mammals.

What are the ethical concerns associated with modern animal testing?

Ethical concerns surrounding animal testing center on the moral status of animals and their capacity to experience pain and suffering. Many critics argue that subjecting sentient beings to invasive procedures, confinement, and eventual euthanasia violates fundamental principles of animal welfare. The use of non-human primates, dogs, and other cognitively complex animals raises particular concern due to their emotional depth and social behaviors, which can be severely disrupted in laboratory environments. Even with regulations like the Three Rs (Replace, Reduce, Refine), many feel that the current framework does not go far enough in protecting animals from distress.

Additionally, the justification of animal testing often hinges on potential human benefit, but critics question the validity of extrapolating results from animals to humans. Species differences can lead to misleading conclusions, potentially endangering human health while subjecting animals to harm. There is also a growing demand for transparency, with advocates calling for public access to the number of animals used, the types of procedures performed, and the success rates of such tests. As society becomes more aware of animal sentience and alternatives emerge, the ethical foundation supporting animal testing continues to erode, pushing scientists and policymakers to reevaluate long-standing practices.

How are technological alternatives reducing reliance on animal testing?

Technological innovations are increasingly offering reliable alternatives that reduce or eliminate the need for animal testing. In vitro models using human cells—such as skin, liver, and lung tissue cultures—allow researchers to study toxicity and drug responses without animals. Organ-on-a-chip technology, which mimics the structure and function of human organs on microfluidic devices, can simulate how drugs interact with complex biological systems, providing more human-relevant data than animal models. Similarly, 3D bioprinting enables the creation of tissue models that can be used for disease research and drug screening with high precision.

Computational models and artificial intelligence are also transforming the landscape by predicting toxicity, absorption, and side effects based on vast databases of chemical and biological information. These tools can rapidly screen thousands of compounds, reducing the time and animals required in early stages of research. Initiatives like the EPA’s commitment to reducing mammalian testing and the European Union’s investment in non-animal methods demonstrate institutional support for these technologies. While not yet capable of replacing all animal studies, especially in complex systemic interactions, these alternatives are steadily gaining validation and trust across scientific and regulatory communities.

What role do government regulations play in perpetuating or limiting animal testing?

Government regulations play a dual role in both perpetuating and limiting animal testing, depending on the region and sector. In many countries, laws and guidelines require animal data for product safety evaluations, especially for pharmaceuticals, pesticides, and industrial chemicals. For example, the FDA in the U.S. does not ban animal testing and often relies on it to approve new drugs, making it a de facto requirement. Similarly, chemical regulations in some nations demand repeated-dose toxicity studies in animals, constraining companies that wish to avoid such testing. These mandates sustain demand for animal models even when alternatives exist.

Conversely, governments are also instrumental in advancing non-animal testing through funding, policy reform, and regulatory acceptance of alternatives. The European Union’s REACH regulation, while still allowing animal testing, strongly encourages the use of alternative methods and promotes data sharing to minimize animal use. Countries like the Netherlands and Germany have set national goals to phase out animal testing by investing in new technologies and establishing centers for alternative methods. Regulatory bodies such as the European Centre for the Validation of Alternative Methods (EURL ECVAM) work to validate and approve new non-animal tests, speeding their adoption. Thus, while outdated regulations slow progress, forward-thinking policies are beginning to shift the balance toward a more humane and effective science.