The main purpose of this legislation, known as the Cease Animal Research Grants Overseas Act of 2025, is to prevent the National Institutes of Health (NIH) from funding any research activities that involve the use of live animals if those activities take place outside the United States. The objective is to ensure better oversight and animal welfare in research funded by American taxpayers. Key provisions of the legislation include a clear prohibition on NIH support for any research involving live animals conducted outside the U.S.