The National Institutes of Health (NIH) is inviting grant applications for the Basic Research in Cancer Health Disparities (R21 Clinical Trial Not Allowed), aimed at exploring the biological and genetic causes of cancer health disparities. This funding opportunity encourages innovative studies that investigate biological factors associated with cancer disparities, including mechanistic research, the development of new methodologies, and secondary data analyses, with a focus on enhancing the understanding of these disparities particularly among underrepresented racial and ethnic groups. Eligible applicants include a diverse range of organizations, such as higher education institutions, nonprofits, and tribal governments, with a funding ceiling of $275,000 over a two-year period. Interested parties should submit their applications by September 7, 2024, and can direct inquiries to the NIH OER Webmaster at OERWebmaster03@od.nih.gov for further information.