HB1291, the HEARTS Act of 2025, would direct the National Institutes of Health and federally funded research entities to prioritize nonanimal research methods whenever those methods are scientifically satisfactory and feasible. The bill amends the Public Health Service Act to require NIH research proposals to evaluate nonanimal alternatives before animal use is approved, to include reviewers with expertise in nonanimal methods, and to ensure access to reference librarians who can assess searches for alternatives. It also requires stronger assurances in animal-research proposals that no scientifically satisfactory nonanimal method is available.
The bill would create a new National Center for Alternatives to Animals in Research and Testing within NIH, with a director appointed by the Secretary of Health and Human Services. That center would fund and promote alternatives such as organoids, microphysiological systems, induced pluripotent stem cells, in silico modeling, advanced imaging, and artificial intelligence, while also training scientists, facilitating collaborations, and collecting public data on animal use in federally funded research. In addition, the bill would require covered research entities and federal agencies to report the number of animals used and bred or acquired for research, update those reports every two years, and submit public plans for reducing animal use.
The bill’s impact on state laws is indirect because it amends federal law, specifically the Public Health Service Act, and would primarily affect NIH-funded research institutions, federal agencies, and other recipients of federal research funds. It would expand federal oversight and reporting requirements for animal research, create new administrative duties within NIH, and establish a formal federal infrastructure for developing and funding nonanimal alternatives. The bill also broadens the public availability of data on animal use in research and testing.
The general sentiment reflected in the bill text is strongly supportive of replacing or reducing animal use in research, while preserving biomedical research goals. The findings emphasize that animal research has contributed to important medical advances, but also argue that current animal models are often insufficiently predictive for human outcomes and that better human-relevant technologies are now available. No committee transcript or vote data is available here, so there is no recorded opposition or amendment debate in the provided materials.
The main points of contention likely concern whether the bill could slow or complicate animal-based research, how strictly “scientifically satisfactory” nonanimal methods would be interpreted, and the cost and feasibility of creating a new NIH center and reporting system. Supporters would likely emphasize transparency, humane research, and improved scientific relevance, while critics may worry about added bureaucracy, implementation burdens on researchers, and whether the mandate could be applied too rigidly in areas where animal models remain necessary.
HB1291 would amend the Public Health Service Act to add new NIH requirements for prioritizing nonanimal methods, expand review and documentation obligations for animal-based research proposals, create a new NIH center focused on alternatives to animal testing, and impose recurring public reporting requirements on federally funded entities that use animals. Its practical effect would be to increase federal oversight, transparency, and funding support for alternative methods while potentially reducing the use of animals in federally supported biomedical and behavioral research.
The bill is framed in strongly pro-alternative, pro-transparency terms and presents animal reduction as both a scientific and humane goal. The findings acknowledge the value of past animal research but argue that modern human-based methods should be prioritized and better supported. Because no committee discussion or vote history is provided, there is no recorded legislative opposition or bipartisan debate in the supplied materials, though the bill’s structure suggests support for research innovation and animal welfare.
Likely areas of contention include whether NIH should be required to prioritize nonanimal methods before animal use, how much discretion researchers and reviewers would retain, and whether the new reporting and center-creation requirements would impose significant administrative costs. Another possible dispute is scientific: supporters argue that human-relevant alternatives are increasingly effective, while skeptics may contend that animal models remain necessary for some research and that the bill could be difficult to implement consistently across fields. The bill text itself does not identify named opponents, and no votes or transcripts are available to show formal objections.